发明名称 |
Method and apparatus for processing wideband data in a digital cellular communication system |
摘要 |
A system and method for processing wideband data within digital FM transceiver. A digital FM demodulator within the transceiver produces a demodulated information signal in response to the FM signal. The digital FM receiver also includes a wideband message processing section for recovering message information from the demodulated information signal. A word register circuit within the wideband message processing section stores one or more repetitions of a message word recovered from the demodulated information signal. During operation of the FM receiver in a control channel mode, a dotting detector within the wideband processing section is used for detecting a first dotting sequence within the demodulated information signal. Similarly, the dotting detector serves to detect a second dotting sequence within the demodulated information signal during operation in a voice channel mode. A word sync sequence is also identified within the demodulated information signal prior to storage of the one or more repetitions of the received message word within the word register circuit. A reconstructed message word is then generated by comparing corresponding bits within the one or more repetitions of the one message word. A message prefilter determines whether a processor interrupt should be generated by ascertaining whether the reconstructed message word is of a predefined type. A digital FM transmitter of the transceiver is controlled on the basis of busy-idle channel status information recovered from the demodulated information signal.
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申请公布号 |
US5812607(A) |
申请公布日期 |
1998.09.22 |
申请号 |
US19960595320 |
申请日期 |
1996.02.01 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
HUTCHINSON, IV, JAMES A.;AULT, JAN C. |
分类号 |
H04B7/26;(IPC1-7):H03D3/00;H03K9/06 |
主分类号 |
H04B7/26 |
代理机构 |
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