{"id":162,"date":"2026-05-01T15:38:31","date_gmt":"2026-05-01T07:38:31","guid":{"rendered":"https:\/\/thebg5hvn.top\/?p=162"},"modified":"2026-05-01T15:38:31","modified_gmt":"2026-05-01T07:38:31","slug":"%f0%9f%93%a1-%e4%bb%8e-2fsk-%e4%b8%bb%e5%b3%b0%e9%87%8d%e5%8f%a0%e5%88%b0-gmsk%ef%bc%9a%e9%a2%91%e5%81%8f%e3%80%81%e7%a0%81%e5%85%83%e9%80%9f%e7%8e%87%e4%b8%8e%e8%b0%83%e5%88%b6%e6%8c%87%e6%95%b0","status":"publish","type":"post","link":"https:\/\/thebg5hvn.top\/index.php\/2026\/05\/01\/%f0%9f%93%a1-%e4%bb%8e-2fsk-%e4%b8%bb%e5%b3%b0%e9%87%8d%e5%8f%a0%e5%88%b0-gmsk%ef%bc%9a%e9%a2%91%e5%81%8f%e3%80%81%e7%a0%81%e5%85%83%e9%80%9f%e7%8e%87%e4%b8%8e%e8%b0%83%e5%88%b6%e6%8c%87%e6%95%b0\/","title":{"rendered":"\ud83d\udce1 \u4ece 2FSK \u4e3b\u5cf0\u91cd\u53e0\u5230 GMSK\uff1a\u9891\u504f\u3001\u7801\u5143\u901f\u7387\u4e0e\u8c03\u5236\u6307\u6570\u4e00\u6b21\u8bb2\u6e05"},"content":{"rendered":"
\n

\n \ud83d\udce1 \u4ece 2FSK \u4e3b\u5cf0\u91cd\u53e0\u5230 GMSK\uff1a\u9891\u504f\u3001\u7801\u5143\u901f\u7387\u4e0e\u8c03\u5236\u6307\u6570\u4e00\u6b21\u8bb2\u6e05
\n <\/h1>\n

\n \u5728\u5b66\u4e60 2FSK \u9891\u8c31\u65f6\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e2a\u5bb9\u6613\u6df7\u6dc6\u7684\u95ee\u9898\uff1a
\n \u4ec0\u4e48\u65f6\u5019\u4e24\u4e2a\u4e3b\u5cf0\u4f1a\u91cd\u53e0\uff1f\u4ec0\u4e48\u65f6\u5019\u4e24\u4e2a\u4e3b\u5cf0\u521a\u597d\u5206\u5f00\uff1fGMSK \u53c8\u548c\u8fd9\u4e2a\u6761\u4ef6\u6709\u4ec0\u4e48\u5173\u7cfb\uff1f<\/strong>\n <\/p>\n

\n \u8868\u9762\u4e0a\u770b\uff0c\u8fd9\u51e0\u4e2a\u95ee\u9898\u90fd\u548c FSK \u6709\u5173\uff0c\u4f46\u5b83\u4eec\u5173\u6ce8\u7684\u89d2\u5ea6\u5e76\u4e0d\u5b8c\u5168\u4e00\u6837\u3002
\n 2FSK \u4e3b\u5cf0\u662f\u5426\u5206\u5f00\uff0c\u4e3b\u8981\u770b\u9891\u504f\u548c\u7801\u5143\u901f\u7387\u7684\u6bd4\u4f8b<\/strong>\uff1b
\n MSK\/GMSK \u5219\u8fdb\u4e00\u6b65\u6d89\u53ca\u8c03\u5236\u6307\u6570\u3001\u8fde\u7eed\u76f8\u4f4d\u548c\u9ad8\u65af\u6ee4\u6ce2<\/strong>\u3002\n <\/p>\n

\n \u6838\u5fc3\u7ed3\u8bba\uff1a<\/strong>
\n 2FSK \u7684\u4e24\u4e2a\u4e3b\u74e3\u662f\u5426\u91cd\u53e0\uff0c\u770b\u7684\u662f\u5355\u8fb9\u9891\u504f \u0394fd \u4e0e\u7801\u5143\u901f\u7387 fb \u7684\u6bd4\u4f8b\u3002
\n \u5f53 \u0394fd \/ fb = 1 \u65f6\uff0c\u4e24\u4e2a\u4e3b\u74e3\u6309\u201c\u7b2c\u4e00\u96f6\u70b9\u201d\u53e3\u5f84\u5224\u65ad\u65f6\u521a\u597d\u5206\u5f00\uff1b
\n \u800c MSK\/GMSK \u5bf9\u5e94\u7684\u662f \u0394fd \/ fb = 0.25\uff0c\u56e0\u6b64\u9891\u8c31\u4e0a\u901a\u5e38\u4e0d\u662f\u4e24\u4e2a\u6e05\u695a\u5206\u5f00\u7684\u4e3b\u5cf0\uff0c
\n \u800c\u662f\u4e00\u4e2a\u8f83\u96c6\u4e2d\u7684\u3001\u5e73\u6ed1\u7684\u4e3b\u9891\u8c31\u5305\u7edc\u3002\n <\/div>\n

\u4e00\u3001\u5148\u660e\u786e\u51e0\u4e2a\u91cf<\/h2>\n

\n \u5bf9\u4e8e\u4e8c\u8fdb\u5236 FSK\uff0c\u4e5f\u5c31\u662f 2FSK\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u7528\u4e24\u4e2a\u4e0d\u540c\u7684\u9891\u7387\u8868\u793a 0 \u548c 1\u3002\n <\/p>\n

\n

\n f1\u3001f2\uff1a<\/strong>2FSK \u7684\u4e24\u4e2a\u9891\u7387\u72b6\u6001\uff1b
\n \u0394fd\uff1a<\/strong>\u5355\u8fb9\u9891\u504f\uff0c\u7b49\u4e8e\u4e24\u4e2a\u9891\u7387\u95f4\u9694\u7684\u4e00\u534a\uff1b
\n fb\uff1a<\/strong>\u7801\u5143\u901f\u7387\uff0c\u4e8c\u8fdb\u5236\u60c5\u51b5\u4e0b\u4e5f\u5c31\u662f\u6bd4\u7279\u7387\uff1b
\n h\uff1a<\/strong>FSK \u8c03\u5236\u6307\u6570\u3002\n <\/p>\n<\/p><\/div>\n

\n \u8fd9\u51e0\u4e2a\u91cf\u4e4b\u95f4\u6709\u4e00\u4e2a\u975e\u5e38\u5173\u952e\u7684\u5173\u7cfb\uff1a\n <\/p>\n

$$
\n \\begin{aligned}
\n h &= \\frac{2\\Delta f_d}{f_b} \\\\
\n \\frac{\\Delta f_d}{f_b} &= \\frac{h}{2}
\n \\end{aligned}
\n $$<\/p>\n

\n \u6240\u4ee5\uff0c\u53ea\u8981\u77e5\u9053 \u0394fd \/ fb\uff0c\u5c31\u53ef\u4ee5\u6362\u7b97\u51fa\u8c03\u5236\u6307\u6570 h\uff1b
\n \u53cd\u8fc7\u6765\uff0c\u77e5\u9053\u8c03\u5236\u6307\u6570 h\uff0c\u4e5f\u80fd\u5224\u65ad\u9891\u504f\u548c\u7801\u5143\u901f\u7387\u7684\u6bd4\u4f8b\u3002\n <\/p>\n

\u4e8c\u30012FSK \u7684\u4e3b\u74e3\u5bbd\u5ea6\u5230\u5e95\u600e\u4e48\u770b\uff1f<\/h2>\n

\n \u5f88\u5bb9\u6613\u8bef\u4ee5\u4e3a\u4e00\u4e2a\u4e3b\u74e3\u7684\u5bbd\u5ea6\u5c31\u662f fb\uff0c\u4f46\u8fd9\u5176\u5b9e\u4e0d\u51c6\u786e\u3002\n <\/p>\n

\n \u4e00\u4e2a\u9891\u7387\u72b6\u6001\u5728\u4e00\u4e2a\u7801\u5143\u65f6\u95f4\u5185\u6301\u7eed\uff0c\u9891\u8c31\u4e0a\u4e0d\u4f1a\u662f\u4e00\u6839\u65e0\u9650\u7ec6\u7684\u7ebf\uff0c
\n \u800c\u4f1a\u5f62\u6210\u4e00\u4e2a\u4e3b\u74e3\u3002\u6309\u5e38\u89c1\u8fd1\u4f3c\u53e3\u5f84\uff0c\u4e00\u4e2a\u4e3b\u74e3\u7684\u7b2c\u4e00\u96f6\u70b9\u5927\u7ea6\u51fa\u73b0\u5728\u4e2d\u5fc3\u9891\u7387\u5de6\u53f3\u5404 fb \u7684\u4f4d\u7f6e\u3002\n <\/p>\n

\n \u5173\u952e\u70b9\uff1a<\/strong>
\n \u5bf9\u4e8e\u4ee5 f1 \u4e3a\u4e2d\u5fc3\u7684\u4e3b\u74e3\uff0c\u5b83\u7684\u8303\u56f4\u5927\u7ea6\u662f\u4ece f1 – fb \u5230 f1 + fb\u3002
\n \u56e0\u6b64\uff0c\u5355\u4e2a\u4e3b\u74e3\u7684\u5b8c\u6574\u5bbd\u5ea6\u5927\u7ea6\u662f 2fb\uff0c\u800c\u4e0d\u662f fb\u3002\n <\/div>\n

$$
\n \\begin{aligned}
\n \\text{\u4ee5 } f_1 \\text{ \u4e3a\u4e2d\u5fc3\u7684\u4e3b\u74e3\u8303\u56f4} &= f_1 – f_b \\ \\text{\u5230}\\ f_1 + f_b \\\\
\n \\text{\u4ee5 } f_2 \\text{ \u4e3a\u4e2d\u5fc3\u7684\u4e3b\u74e3\u8303\u56f4} &= f_2 – f_b \\ \\text{\u5230}\\ f_2 + f_b
\n \\end{aligned}
\n $$<\/p>\n

\u4e09\u3001\u4ec0\u4e48\u65f6\u5019\u4e24\u4e2a\u4e3b\u74e3\u521a\u597d\u5206\u5f00\uff1f<\/h2>\n

\n \u4e24\u4e2a\u4e3b\u74e3\u521a\u597d\u5206\u5f00\uff0c\u5c31\u662f\u5de6\u8fb9\u4e3b\u74e3\u7684\u53f3\u4fa7\u7b2c\u4e00\u4e2a\u96f6\u70b9\uff0c\u6b63\u597d\u78b0\u5230\u53f3\u8fb9\u4e3b\u74e3\u7684\u5de6\u4fa7\u7b2c\u4e00\u4e2a\u96f6\u70b9\u3002\n <\/p>\n

$$
\n f_1 + f_b = f_2 – f_b
\n $$<\/p>\n

\n \u79fb\u9879\u540e\u5f97\u5230\uff1a\n <\/p>\n

$$
\n f_2 – f_1 = 2f_b
\n $$<\/p>\n

\n \u53c8\u56e0\u4e3a\u5355\u8fb9\u9891\u504f \u0394fd \u662f\u4e24\u4e2a\u9891\u7387\u95f4\u9694\u7684\u4e00\u534a\uff1a\n <\/p>\n

$$
\n \\Delta f_d = \\frac{|f_2 – f_1|}{2}
\n $$<\/p>\n

\n \u6240\u4ee5\uff1a\n <\/p>\n

$$
\n \\begin{aligned}
\n 2\\Delta f_d &= 2f_b \\\\
\n \\Delta f_d &= f_b \\\\
\n \\frac{\\Delta f_d}{f_b} &= 1
\n \\end{aligned}
\n $$<\/p>\n

\n \u7ed3\u8bba\uff1a<\/strong>
\n \u6309\u4e3b\u74e3\u7b2c\u4e00\u96f6\u70b9\u5224\u65ad\uff0c2FSK \u4e24\u4e2a\u4e3b\u74e3\u521a\u597d\u5206\u5f00\u7684\u6761\u4ef6\u662f\uff1a
\n \u0394fd \/ fb = 1<\/strong>\u3002\n <\/div>\n

\u56db\u3001\u4eff\u771f\u793a\u610f\uff1a\u4e3b\u74e3\u91cd\u53e0\u4e0e\u4e3b\u74e3\u5206\u5f00<\/h2>\n

\n \u4e0b\u9762\u7528\u4e24\u4e2a\u7b80\u5316\u4eff\u771f\u793a\u610f\u56fe\u6765\u5e2e\u52a9\u7406\u89e3\u3002\u56fe\u4e2d\u4e24\u4e2a\u5f69\u8272\u66f2\u7ebf\u5206\u522b\u4ee3\u8868\u4ee5 f1\u3001f2 \u4e3a\u4e2d\u5fc3\u7684\u4e24\u4e2a\u9891\u7387\u72b6\u6001\u5f62\u6210\u7684\u4e3b\u74e3\uff1b
\n \u6df1\u8272\u66f2\u7ebf\u8868\u793a\u4e8c\u8005\u53e0\u52a0\u540e\u7684\u603b\u4f53\u9891\u8c31\u5305\u7edc\u3002\n <\/p>\n

\n \n <\/rect>\n \u56fe 1\uff1a\u0394fd \/ fb = 0.25\uff0c\u4e24\u4e2a\u4e3b\u74e3\u4e25\u91cd\u91cd\u53e0<\/text>\n <\/line>\n <\/line>\n<\/path>\n <\/path>\n <\/path>\n<\/line>\n <\/line>\n

f1<\/text>\n f2<\/text>\n \u4e24\u4e2a\u9891\u7387\u4e2d\u5fc3\u8ddd\u79bb\u8f83\u8fd1<\/text><\/p>\n

<\/rect>\n \u89c2\u5bdf\u7ed3\u679c<\/text>\n \u4e24\u4e2a\u4e3b\u74e3\u4e25\u91cd\u53e0\u52a0\uff0c<\/text>\n \u9891\u8c31\u4e0a\u901a\u5e38\u50cf\u4e00\u4e2a\u4e3b\u5cf0\u3002<\/text>\n <\/svg>

\n \u56fe 1\uff1a<\/strong>\u5f53 \u0394fd \/ fb = 0.25 \u65f6\uff0c\u4e24\u4e2a\u4e3b\u74e3\u4e25\u91cd\u91cd\u53e0\uff0c\u9891\u8c31\u4e0a\u901a\u5e38\u66f4\u50cf\u4e00\u4e2a\u4e3b\u5cf0\u3002
\n \u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u7b80\u5355\u8ba4\u4e3a\u201c2FSK \u4e00\u5b9a\u4f1a\u770b\u5230\u4e24\u4e2a\u5c16\u5cf0\u201d\u3002
\n <\/figcaption><\/figure>\n
\n \n <\/rect>\n \u56fe 2\uff1a\u0394fd \/ fb = 1\uff0c\u6309\u7b2c\u4e00\u96f6\u70b9\u53e3\u5f84\u521a\u597d\u5206\u5f00<\/text>\n <\/line>\n <\/line>\n<\/path>\n <\/path>\n

<\/circle>\n \u7b2c\u4e00\u96f6\u70b9\u76f8\u63a5<\/text><\/p>\n<\/line>\n <\/line>\n

f1<\/text>\n f2<\/text><\/p>\n

<\/rect>\n \u89c2\u5bdf\u7ed3\u679c<\/text>\n \u4e24\u4e2a\u4e3b\u74e3\u521a\u597d\u76f8\u63a5\uff0c<\/text>\n \u7ee7\u7eed\u589e\u5927\u9891\u504f\u624d\u771f\u6b63\u5206\u5f00\u3002<\/text>\n <\/svg>

\n \u56fe 2\uff1a<\/strong>\u5f53 \u0394fd \/ fb = 1 \u65f6\uff0c\u4e24\u4e2a\u4e3b\u74e3\u6309\u201c\u7b2c\u4e00\u96f6\u70b9\u201d\u53e3\u5f84\u5224\u65ad\u65f6\u521a\u597d\u5206\u5f00\u3002
\n \u8fd9\u662f 2FSK \u9891\u8c31\u4e2d\u201c\u4e3b\u74e3\u521a\u597d\u4e0d\u91cd\u53e0\u201d\u7684\u5178\u578b\u4e34\u754c\u6761\u4ef6\u3002
\n <\/figcaption><\/figure>\n

\u4e94\u3001\u4e0d\u540c \u0394fd \/ fb \u4e0b\u7684\u9891\u8c31\u5f62\u6001<\/h2>\n

\n \u5f53 \u0394fd \/ fb \u4e0d\u540c\u65f6\uff0c2FSK \u7684\u9891\u8c31\u5f62\u6001\u4f1a\u53d1\u751f\u660e\u663e\u53d8\u5316\u3002
\n \u53ef\u4ee5\u6309\u4e0b\u9762\u8fd9\u5f20\u8868\u7406\u89e3\u3002\n <\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u0394fd \/ fb<\/th>\n\u8c03\u5236\u6307\u6570 h<\/th>\n\u9891\u8c31\u5f62\u6001<\/th>\n<\/tr>\n<\/thead>\n
0.25<\/td>\n0.5<\/td>\n\u4e24\u4e2a\u4e3b\u74e3\u4e25\u91cd\u91cd\u53e0\uff0c\u901a\u5e38\u770b\u6210\u4e00\u4e2a\u4e3b\u5cf0<\/td>\n<\/tr>\n
0.5<\/td>\n1<\/td>\n\u4e24\u4e2a\u5cf0\u53ef\u80fd\u5f00\u59cb\u663e\u73b0\uff0c\u4f46\u4e3b\u74e3\u4ecd\u660e\u663e\u91cd\u53e0<\/td>\n<\/tr>\n
0.5\uff5e1<\/td>\n1\uff5e2<\/td>\n\u4e24\u4e2a\u6709\u91cd\u53e0\u7684\u4e3b\u5cf0<\/td>\n<\/tr>\n
1<\/td>\n2<\/td>\n\u6309\u7b2c\u4e00\u96f6\u70b9\u53e3\u5f84\uff0c\u4e24\u4e2a\u4e3b\u74e3\u521a\u597d\u5206\u5f00<\/td>\n<\/tr>\n
\u5927\u4e8e 1<\/td>\n\u5927\u4e8e 2<\/td>\n\u4e24\u4e2a\u4e3b\u74e3\u57fa\u672c\u4e92\u4e0d\u91cd\u53e0<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

\n \u8fd9\u4e5f\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u6709\u4e9b\u9898\u76ee\u7ed9\u51fa \u0394fd \/ fb = 0.25 \u65f6\uff0c\u7b54\u6848\u4f1a\u5224\u65ad\u4e3a\u201c\u4e00\u4e2a\u4e3b\u5cf0\u201d\u3002
\n \u56e0\u4e3a\u8fd9\u4e2a\u65f6\u5019\u4e24\u4e2a\u9891\u7387\u72b6\u6001\u79bb\u5f97\u5e76\u4e0d\u8fdc\uff0c\u4e24\u4e2a\u4e3b\u74e3\u4e25\u91cd\u53e0\u52a0\uff0c\u9891\u8c31\u4e0a\u5f80\u5f80\u4e0d\u4f1a\u5f62\u6210\u4e24\u4e2a\u6e05\u695a\u5206\u5f00\u7684\u5cf0\u3002\n <\/p>\n

\u516d\u3001MSK \u548c\u8fd9\u4e2a\u6bd4\u4f8b\u6709\u4ec0\u4e48\u5173\u7cfb\uff1f<\/h2>\n

\n MSK \u662f Minimum Shift Keying\uff0c\u4e2d\u6587\u53eb\u6700\u5c0f\u9891\u79fb\u952e\u63a7\u3002
\n \u5b83\u53ef\u4ee5\u770b\u4f5c\u4e00\u79cd\u7279\u6b8a\u7684\u8fde\u7eed\u76f8\u4f4d 2FSK\u3002\n <\/p>\n

\n MSK \u7684\u5173\u952e\u6761\u4ef6\u662f\uff1a\n <\/p>\n

$$
\n h = 0.5
\n $$<\/p>\n

\n \u4ee3\u5165\u524d\u9762\u7684\u5173\u7cfb\uff1a\n <\/p>\n

$$
\n \\begin{aligned}
\n h &= \\frac{2\\Delta f_d}{f_b} \\\\
\n 0.5 &= \\frac{2\\Delta f_d}{f_b} \\\\
\n \\frac{\\Delta f_d}{f_b} &= 0.25
\n \\end{aligned}
\n $$<\/p>\n

\n \u91cd\u8981\u7ed3\u8bba\uff1a<\/strong>
\n MSK \u5bf9\u5e94\u7684\u6b63\u662f \u0394fd \/ fb = 0.25\uff0c\u4e5f\u5c31\u662f\u8c03\u5236\u6307\u6570 h = 0.5\u3002\n <\/div>\n

\n \u4e5f\u5c31\u662f\u8bf4\uff0cMSK \u5e76\u4e0d\u662f\u4e24\u4e2a\u4e3b\u74e3\u521a\u597d\u5206\u5f00\u7684 FSK\u3002
\n \u76f8\u53cd\uff0c\u4ece\u666e\u901a 2FSK \u9891\u8c31\u4e3b\u74e3\u7684\u89d2\u5ea6\u770b\uff0cMSK \u5bf9\u5e94\u7684\u662f\u4e24\u4e2a\u4e3b\u74e3\u4e25\u91cd\u91cd\u53e0\u7684\u60c5\u51b5\u3002\n <\/p>\n

\u4e03\u3001GMSK \u53c8\u662f\u4ec0\u4e48\uff1f<\/h2>\n

\n GMSK \u662f Gaussian Minimum Shift Keying\uff0c\u4e2d\u6587\u53eb\u9ad8\u65af\u6700\u5c0f\u9891\u79fb\u952e\u63a7\u3002\n <\/p>\n

\n \u5b83\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3\uff1a\n <\/p>\n

\n
\n
\n
\ud83d\udd22<\/div>\n

\u539f\u59cb\u6bd4\u7279<\/strong>\n <\/div>\n

\n
\u3030\ufe0f<\/div>\n

\u9ad8\u65af\u6ee4\u6ce2<\/strong>\n <\/div>\n

\n
\ud83c\udfaf<\/div>\n

MSK \u8c03\u5236<\/strong>\n <\/div>\n

\n
\ud83d\udce1<\/div>\n

GMSK \u4fe1\u53f7<\/strong>\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n

\n GMSK = \u9ad8\u65af\u6ee4\u6ce2\u540e\u7684 MSK\u3002<\/strong>
\n \u800c MSK \u662f\u8c03\u5236\u6307\u6570 h = 0.5 \u7684\u8fde\u7eed\u76f8\u4f4d 2FSK\u3002\n <\/div>\n

\n \u56e0\u6b64\uff0cGMSK \u4e5f\u5c5e\u4e8e 2FSK \u5bb6\u65cf\uff0c\u4f46\u5b83\u4e0d\u662f\u666e\u901a\u201c\u786c\u5207\u6362\u201d\u7684 2FSK\uff0c
\n \u800c\u662f\u7ecf\u8fc7\u9ad8\u65af\u6ee4\u6ce2\u3001\u9891\u7387\u53d8\u5316\u66f4\u5e73\u6ed1\u3001\u76f8\u4f4d\u8fde\u7eed\u7684\u7279\u6b8a FSK\u3002\n <\/p>\n

\u516b\u3001GMSK \u4e3a\u4ec0\u4e48\u4e0d\u662f\u4e24\u4e2a\u5206\u5f00\u7684\u4e3b\u5cf0\uff1f<\/h2>\n

\n \u8fd9\u4e00\u70b9\u975e\u5e38\u5bb9\u6613\u6df7\u6dc6\u3002\n <\/p>\n

\n \u5982\u679c\u6309\u7167\u666e\u901a 2FSK \u7684\u4e3b\u74e3\u5206\u79bb\u6807\u51c6\uff1a\n <\/p>\n

$$
\n \\frac{\\Delta f_d}{f_b} = 1
\n $$<\/p>\n

\n \u624d\u662f\u4e24\u4e2a\u4e3b\u74e3\u6309\u7b2c\u4e00\u96f6\u70b9\u53e3\u5f84\u521a\u597d\u5206\u5f00\u3002\n <\/p>\n

\n \u800c GMSK \u57fa\u672c\u7ee7\u627f MSK \u7684\u9891\u504f\u6761\u4ef6\uff1a\n <\/p>\n

$$
\n \\frac{\\Delta f_d}{f_b} = 0.25
\n $$<\/p>\n

\n \u8fd9\u4e2a\u6bd4\u4f8b\u8fdc\u5c0f\u4e8e 1\uff0c\u6240\u4ee5\u5b83\u7684\u4e24\u4e2a\u9891\u7387\u72b6\u6001\u5728\u9891\u8c31\u4e0a\u5e76\u4e0d\u4f1a\u8868\u73b0\u4e3a\u4e24\u4e2a\u6e05\u695a\u5206\u5f00\u7684\u4e3b\u74e3\u3002\n <\/p>\n

\n
\n
\n \u56fe 3\uff1aGMSK \u9891\u8c31\u901a\u5e38\u66f4\u50cf\u4e00\u4e2a\u5e73\u6ed1\u96c6\u4e2d\u7684\u4e3b\u5305\u7edc\n <\/div>\n
\n
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fc<\/div>\n
\n
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<\/div>\n<\/p><\/div>\n
\n \u89c2\u5bdf\u7ed3\u679c<\/strong>
\n \u4e0d\u662f\u4e24\u4e2a\u5c16\u9510\u5206\u5cf0\uff0c
\n \u800c\u662f\u4e00\u4e2a\u5706\u6ed1\u3001\u96c6\u4e2d\u7684
\n \u4e3b\u9891\u8c31\u5305\u7edc\u3002\n <\/div>\n<\/p><\/div>\n<\/p><\/div>
\n \u56fe 3\uff1a<\/strong>GMSK \u662f\u9ad8\u65af\u6ee4\u6ce2\u540e\u7684\u8fde\u7eed\u76f8\u4f4d MSK\uff0c\u9891\u7387\u53d8\u5316\u66f4\u5e73\u6ed1\uff0c\u65c1\u74e3\u66f4\u4f4e\uff0c
\n \u56e0\u6b64\u9891\u8c31\u4e0a\u901a\u5e38\u8868\u73b0\u4e3a\u4e00\u4e2a\u5e73\u6ed1\u96c6\u4e2d\u7684\u4e3b\u9891\u8c31\u5305\u7edc\u3002
\n <\/figcaption><\/figure>\n
\n \u5bb9\u6613\u8bef\u89e3\u7684\u5730\u65b9\uff1a<\/strong>
\n GMSK \u4e0d\u662f\u201c\u4e24\u4e2a\u4e3b\u5cf0\u521a\u597d\u5206\u5f00\u201d\u7684 FSK\u3002
\n \u5b83\u6070\u6070\u662f\u5c0f\u9891\u504f\u3001\u8fde\u7eed\u76f8\u4f4d\u3001\u7ecf\u8fc7\u9ad8\u65af\u6ee4\u6ce2\u540e\u7684 FSK\u3002
\n \u5728\u9891\u8c31\u4eea\u4e0a\uff0cGMSK \u901a\u5e38\u66f4\u50cf\u4e00\u4e2a\u5e73\u6ed1\u3001\u96c6\u4e2d\u7684\u4e3b\u9891\u8c31\u5305\u7edc\uff0c\u800c\u4e0d\u662f\u4e24\u4e2a\u5c16\u9510\u5206\u5f00\u7684\u5cf0\u3002\n <\/div>\n

\u4e5d\u3001\u4e3a\u4ec0\u4e48 \u0394fd \/ fb = 0.25 \u8fd8\u80fd\u53eb\u201c\u6700\u5c0f\u9891\u79fb\u201d\uff1f<\/h2>\n

\n \u8fd9\u91cc\u8981\u533a\u5206\u4e24\u4e2a\u5224\u65ad\u6807\u51c6\uff1a\n <\/p>\n

\n
\n
\ud83d\udcca<\/div>\n

\u9891\u8c31\u4e3b\u5cf0\u662f\u5426\u5206\u5f00<\/strong><\/p>\n

\n \u8fd9\u662f\u4ece\u9891\u8c31\u4eea\u663e\u793a\u89d2\u5ea6\u770b\u4e24\u4e2a\u9891\u8c31\u5305\u7edc\u662f\u5426\u91cd\u53e0\u3002
\n \u5b83\u5173\u5fc3\u7684\u662f\u4e3b\u74e3\u5f62\u6001\u3002\n <\/p>\n<\/p><\/div>\n

\n
\ud83c\udfaf<\/div>\n

MSK \u7684\u6700\u5c0f\u9891\u79fb<\/strong><\/p>\n

\n \u8fd9\u662f\u4ece\u6570\u5b57\u901a\u4fe1\u6b63\u4ea4\u89e3\u8c03\u89d2\u5ea6\u770b\uff0c\u5728\u8fde\u7eed\u76f8\u4f4d\u6761\u4ef6\u4e0b\uff0c\u7528\u5c3d\u91cf\u5c0f\u7684\u9891\u7387\u95f4\u9694\u4ecd\u7136\u533a\u5206\u7b26\u53f7\u72b6\u6001\u3002\n <\/p>\n<\/p><\/div>\n<\/p><\/div>\n

\n \u6240\u4ee5\uff0c\u9891\u8c31\u4e0a\u4e24\u4e2a\u4e3b\u5cf0\u662f\u5426\u5206\u5f00\uff0c\u5e76\u4e0d\u7b49\u4e8e\u4fe1\u53f7\u80fd\u4e0d\u80fd\u88ab\u6b63\u786e\u89e3\u8c03\u3002
\n MSK \u867d\u7136\u4ece\u9891\u8c31\u4e3b\u74e3\u89d2\u5ea6\u770b\u662f\u91cd\u53e0\u7684\uff0c\u4f46\u7531\u4e8e\u5b83\u6ee1\u8db3\u7279\u5b9a\u7684\u8fde\u7eed\u76f8\u4f4d\u548c\u6b63\u4ea4\u6761\u4ef6\uff0c
\n \u63a5\u6536\u673a\u4ecd\u7136\u53ef\u4ee5\u8fdb\u884c\u6709\u6548\u89e3\u8c03\u3002\n <\/p>\n

\u5341\u3001\u666e\u901a 2FSK\u3001MSK\u3001GMSK \u5bf9\u6bd4<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
\u9879\u76ee<\/th>\n\u666e\u901a 2FSK<\/th>\nMSK<\/th>\nGMSK<\/th>\n<\/tr>\n<\/thead>\n
\u672c\u8d28<\/td>\n\u4e24\u4e2a\u9891\u7387\u8868\u793a 0 \u548c 1<\/td>\n\u7279\u6b8a\u8fde\u7eed\u76f8\u4f4d 2FSK<\/td>\n\u9ad8\u65af\u6ee4\u6ce2\u540e\u7684 MSK<\/td>\n<\/tr>\n
\u8c03\u5236\u6307\u6570 h<\/td>\n\u53ef\u5927\u53ef\u5c0f<\/td>\n0.5<\/td>\n\u901a\u5e38\u57fa\u4e8e 0.5<\/td>\n<\/tr>\n
\u0394fd \/ fb<\/td>\n\u53ef\u5927\u53ef\u5c0f<\/td>\n0.25<\/td>\n\u901a\u5e38\u57fa\u4e8e 0.25<\/td>\n<\/tr>\n
\u76f8\u4f4d<\/td>\n\u53ef\u8fde\u7eed\uff0c\u4e5f\u53ef\u4e0d\u8fde\u7eed<\/td>\n\u8fde\u7eed<\/td>\n\u8fde\u7eed<\/td>\n<\/tr>\n
\u9891\u7387\u53d8\u5316<\/td>\n\u53ef\u80fd\u8f83\u786c<\/td>\n\u8f83\u5e73\u6ed1<\/td>\n\u66f4\u5e73\u6ed1<\/td>\n<\/tr>\n
\u9891\u8c31\u5f62\u6001<\/td>\n\u53ef\u80fd\u4e00\u4e2a\u5cf0\uff0c\u4e5f\u53ef\u80fd\u4e24\u4e2a\u5cf0<\/td>\n\u901a\u5e38\u4e00\u4e2a\u8f83\u96c6\u4e2d\u7684\u4e3b\u5cf0<\/td>\n\u66f4\u5706\u6ed1\u3001\u66f4\u96c6\u4e2d\u7684\u4e3b\u5cf0<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

\u5341\u4e00\u3001\u5de5\u7a0b\u89c2\u5bdf\u4e2d\u7684\u5b9e\u9645\u610f\u4e49<\/h2>\n

\n \u8fd9\u7ec4\u5173\u7cfb\u5e76\u4e0d\u662f\u4e3a\u4e86\u6b7b\u8bb0\u8003\u8bd5\u516c\u5f0f\uff0c\u800c\u662f\u4e3a\u4e86\u5e2e\u52a9\u6211\u4eec\u7406\u89e3\u5b9e\u9645\u9891\u8c31\u89c2\u5bdf\u4e2d\u7684\u4e00\u4e2a\u5e38\u89c1\u73b0\u8c61\uff1a
\n 2FSK \u4fe1\u53f7\u5e76\u4e0d\u4e00\u5b9a\u603b\u80fd\u770b\u5230\u4e24\u4e2a\u6e05\u695a\u5206\u5f00\u7684\u9891\u7387\u5cf0\u3002<\/strong>\n <\/p>\n

\n
\n
\ud83d\udc40<\/div>\n

\u770b\u9891\u8c31\u65f6<\/strong><\/p>\n

\n \u4e0d\u8981\u7b80\u5355\u8ba4\u4e3a\u201c\u770b\u4e0d\u5230\u4e24\u4e2a\u5cf0\uff0c\u5c31\u4e0d\u662f FSK\u201d\u3002
\n \u5c0f\u9891\u504f FSK\u3001MSK\u3001GMSK \u90fd\u53ef\u80fd\u8868\u73b0\u4e3a\u4e00\u4e2a\u8f83\u5e73\u6ed1\u7684\u4e3b\u5cf0\u3002\n <\/p>\n<\/p><\/div>\n

\n
\ud83d\udcf6<\/div>\n

\u770b GMSK \u65f6<\/strong><\/p>\n

\n GMSK \u9891\u8c31\u4e00\u822c\u66f4\u5706\u3001\u66f4\u96c6\u4e2d\u3001\u65c1\u74e3\u66f4\u4f4e\u3002
\n \u5b83\u66f4\u50cf\u4e00\u4e2a\u5e73\u6ed1\u5305\u7edc\uff0c\u800c\u4e0d\u662f\u4e24\u4e2a\u5c16\u9510\u5206\u5cf0\u3002\n <\/p>\n<\/p><\/div>\n

\n
\ud83d\udcdd<\/div>\n

\u505a\u9898\u65f6<\/strong><\/p>\n

\n \u5982\u679c\u9898\u76ee\u7ed9\u51fa \u0394fd \/ fb = 0.25\uff0c\u5c31\u8981\u60f3\u5230\uff1a
\n \u4e3b\u74e3\u901a\u5e38\u4e25\u91cd\u91cd\u53e0\uff0c\u4e14\u8fd9\u6b63\u597d\u5bf9\u5e94 MSK \u7684\u8c03\u5236\u6307\u6570\u6761\u4ef6\u3002\n <\/p>\n<\/p><\/div>\n<\/p><\/div>\n

\n \u5f53\u7136\uff0c\u771f\u5b9e\u5de5\u7a0b\u4e2d\u7684\u9891\u8c31\u8fd8\u4f1a\u53d7\u5230\u5f88\u591a\u56e0\u7d20\u5f71\u54cd\uff0c\u4f8b\u5982\u7801\u578b\u662f\u5426\u968f\u673a\u3001\u662f\u5426\u7ecf\u8fc7\u9ad8\u65af\u6ee4\u6ce2\u3001
\n \u662f\u5426\u4e3a\u8fde\u7eed\u76f8\u4f4d\u3001\u9891\u8c31\u4eea RBW\/VBW \u8bbe\u7f6e\u3001\u68c0\u6ce2\u65b9\u5f0f\u3001Max Hold\u3001\u53d1\u5c04\u673a\u6ee4\u6ce2\u5668\u548c\u529f\u653e\u975e\u7ebf\u6027\u7b49\u3002\n <\/p>\n

\n \u56e0\u6b64\uff0c\u8fd9\u91cc\u7684 \u0394fd \/ fb \u5224\u65ad\u66f4\u9002\u5408\u4f5c\u4e3a\u7406\u89e3 FSK \u9891\u8c31\u5f62\u6001\u7684\u57fa\u7840\u6846\u67b6\uff0c
\n \u771f\u5b9e\u8c03\u5236\u8bc6\u522b\u8fd8\u9700\u8981\u7ed3\u5408\u7011\u5e03\u56fe\u3001\u77ac\u65f6\u9891\u7387\u3001\u89e3\u8c03\u7ed3\u679c\u3001\u7b26\u53f7\u7387\u4f30\u8ba1\u548c\u5e26\u5bbd\u6d4b\u91cf\u7b49\u4fe1\u606f\u7efc\u5408\u5224\u65ad\u3002\n <\/p>\n

\u5341\u4e8c\u3001\u6700\u7ec8\u8bb0\u5fc6\u7248<\/h2>\n
\n

\n 1. \u5224\u65ad 2FSK \u4e3b\u5cf0\u662f\u5426\u91cd\u53e0\uff1a<\/strong>\n <\/p>\n

\n \u0394fd \/ fb \u8d8a\u5c0f\uff0c\u4e24\u4e2a\u4e3b\u74e3\u8d8a\u91cd\u53e0\uff1b\u0394fd \/ fb \u8d8a\u5927\uff0c\u4e24\u4e2a\u4e3b\u74e3\u8d8a\u5bb9\u6613\u5206\u5f00\u3002
\n \u5f53 \u0394fd \/ fb = 1 \u65f6\uff0c\u4e24\u4e2a\u4e3b\u74e3\u6309\u201c\u7b2c\u4e00\u96f6\u70b9\u201d\u53e3\u5f84\u5224\u65ad\u65f6\u521a\u597d\u5206\u5f00\u3002\n <\/p>\n<\/p><\/div>\n

\n

\n 2. \u5224\u65ad\u662f\u4e0d\u662f MSK\uff1a<\/strong>\n <\/p>\n

\n MSK \u7684\u8c03\u5236\u6307\u6570 h = 0.5\uff0c\u6362\u7b97\u540e\u5c31\u662f \u0394fd \/ fb = 0.25\u3002\n <\/p>\n<\/p><\/div>\n

\n

\n 3. \u5224\u65ad\u662f\u4e0d\u662f GMSK\uff1a<\/strong>\n <\/p>\n

\n GMSK \u662f\u9ad8\u65af\u6ee4\u6ce2\u540e\u7684 MSK\u3002
\n \u5b83\u5c5e\u4e8e\u8fde\u7eed\u76f8\u4f4d 2FSK \u5bb6\u65cf\uff0c\u4f46\u9891\u8c31\u901a\u5e38\u4e0d\u662f\u4e24\u4e2a\u5206\u5f00\u7684\u5c16\u5cf0\uff0c\u800c\u662f\u4e00\u4e2a\u5e73\u6ed1\u96c6\u4e2d\u7684\u4e3b\u9891\u8c31\u5305\u7edc\u3002\n <\/p>\n<\/p><\/div>\n

\u603b\u7ed3<\/h2>\n

\n \u666e\u901a 2FSK \u8ba8\u8bba\u4e3b\u5cf0\u662f\u5426\u91cd\u53e0\u65f6\uff0c\u91cd\u70b9\u770b \u0394fd \/ fb\u3002
\n \u5f53 \u0394fd \/ fb \u8f83\u5c0f\u65f6\uff0c\u4e24\u4e2a\u4e3b\u74e3\u4f1a\u660e\u663e\u91cd\u53e0\uff1b\u5f53 \u0394fd \/ fb = 1 \u65f6\uff0c
\n \u4e24\u4e2a\u4e3b\u74e3\u6309\u201c\u7b2c\u4e00\u96f6\u70b9\u201d\u53e3\u5f84\u5224\u65ad\u65f6\u521a\u597d\u5206\u5f00\uff1b\u5f53 \u0394fd \/ fb \u5927\u4e8e 1 \u65f6\uff0c
\n \u4e24\u4e2a\u4e3b\u74e3\u57fa\u672c\u5206\u5f00\u3002\n <\/p>\n

\n MSK \u662f\u7279\u6b8a\u7684\u8fde\u7eed\u76f8\u4f4d 2FSK\uff0c\u5b83\u7684\u8c03\u5236\u6307\u6570 h = 0.5\uff0c\u4e5f\u5c31\u662f \u0394fd \/ fb = 0.25\u3002
\n \u56e0\u6b64\uff0cMSK \u5e76\u4e0d\u662f\u4e24\u4e2a\u4e3b\u5cf0\u521a\u597d\u5206\u5f00\u7684\u60c5\u51b5\uff0c\u800c\u662f\u4e24\u4e2a\u4e3b\u74e3\u660e\u663e\u91cd\u53e0\u3001
\n \u4f46\u4ecd\u53ef\u6b63\u4ea4\u89e3\u8c03\u7684\u7279\u6b8a FSK\u3002\n <\/p>\n

\n GMSK \u662f\u5728 MSK \u524d\u9762\u52a0\u5165\u9ad8\u65af\u6ee4\u6ce2\uff0c\u4f7f\u9891\u7387\u53d8\u5316\u66f4\u5e73\u6ed1\u3001\u65c1\u74e3\u66f4\u4f4e\u3001\u9891\u8c31\u66f4\u96c6\u4e2d\u3002
\n \u6240\u4ee5 GMSK \u53ef\u4ee5\u770b\u4f5c 2FSK \u5bb6\u65cf\u4e2d\u7684\u9ad8\u7ea7\u5f62\u5f0f\uff0c\u4f46\u51c6\u786e\u8bf4\uff0c
\n \u5b83\u662f\u9ad8\u65af\u6ee4\u6ce2\u540e\u7684\u8fde\u7eed\u76f8\u4f4d MSK<\/strong>\u3002\n <\/p>\n

\n \u4e00\u53e5\u8bdd\u8bb0\u5fc6\uff1a<\/strong>
\n 2FSK \u4e3b\u5cf0\u5206\u4e0d\u5206\u5f00\uff0c\u770b \u0394fd \/ fb\uff1b\u0394fd \/ fb = 1 \u65f6\uff0c\u4e24\u4e2a\u4e3b\u74e3\u6309\u201c\u7b2c\u4e00\u96f6\u70b9\u201d\u53e3\u5f84\u521a\u597d\u5206\u5f00\u3002
\n MSK\/GMSK \u5bf9\u5e94\u7684\u662f \u0394fd \/ fb = 0.25\uff0c\u6240\u4ee5\u9891\u8c31\u4e0a\u901a\u5e38\u662f\u4e00\u4e2a\u5e73\u6ed1\u96c6\u4e2d\u7684\u4e3b\u5cf0\uff0c
\n \u800c\u4e0d\u662f\u4e24\u4e2a\u5206\u5f00\u7684\u4e3b\u5cf0\u3002\n <\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

\ud83d\udce1 \u4ece 2FSK \u4e3b\u5cf0\u91cd\u53e0\u5230 GMSK\uff1a\u9891\u504f\u3001\u7801\u5143\u901f\u7387\u4e0e\u8c03\u5236\u6307\u6570\u4e00\u6b21\u8bb2\u6e05 \u5728\u5b66\u4e60 2FSK \u9891\u8c31\u65f6\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230 … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-162","post","type-post","status-publish","format-standard","hentry","category-radio_tech"],"_links":{"self":[{"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/posts\/162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/comments?post=162"}],"version-history":[{"count":4,"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/posts\/162\/revisions"}],"predecessor-version":[{"id":166,"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/posts\/162\/revisions\/166"}],"wp:attachment":[{"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/media?parent=162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/categories?post=162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thebg5hvn.top\/index.php\/wp-json\/wp\/v2\/tags?post=162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}