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US5491726A Method and apparatus to determine the frequency and time slot position in a digital wireless communication session 失效
用于确定数字无线通信会话中的频率和时隙位置的方法和装置

Method and apparatus to determine the frequency and time slot position
in a digital wireless communication session
摘要:
A digital wireless communication system operates between a first unit and a second unit. The received digitally encoded signal is sampled to produce a first sampled digital signal. A first bank of match filters with each match filter having a different frequency range is used to pass the first sampled digital signal therethrough. The output of the first bank of match filters having the largest amplitude is selected along with the match filter which produced the largest amplitude output. The digitally encoded signal having this "coarse" frequency range is then passed through a second bank of match filters. Each of the match filters has a fine frequency different from one another. The output of the second bank of match filters is produced and the output having the largest amplitude is selected. In addition, the filter producing the largest amplitude from the second bank of match filters is also selected.
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