发明名称 |
ZWEI-MODEN FUNKEMPFÄNGER ZUM EMPFANGEN VON BREITBAND- UND SCHMALBANDSIGNALEN |
摘要 |
A radio receiver for a radio operable in a radio communication system utilizing either a wideband standard such as GSM or a narrowband standard such as IS-54. The radio receiver has a wideband mode for demodulating wideband signals and a narrowband mode for demodulating narrowband signals. The radio receiver uses a wideband filter apparatus having a wide filter bandwidth adapted to the wideband signals for filtering both the wideband and narrowband signals. When in the narrowband mode, a digitizer digitizes the filtered signals containing the narrowband signal and produces digital signals having amplitude and phase signals corresponding to the filtered signals. A digital signal processor is used to frequency shift the digital signals so as to shift the narrowband signals to the center frequency of the wideband filter apparatus. The frequency-shifted narrowband signals are then filtered to select the centered narrowband signals and the narrowband signals are then demodulated. The digital signal processor is adapted to frequency-shift a plurality of different narrowband signals at different radio channel frequencies and to demodulated the different narrowband signals to provide for diversity combination. |
申请公布号 |
DE69623337(D1) |
申请公布日期 |
2002.10.02 |
申请号 |
DE1996623337 |
申请日期 |
1996.03.01 |
申请人 |
ERICSSON INC., RESEARCH TRIANGLE PARK |
发明人 |
DENT, W. |
分类号 |
H04B1/26;H03G5/24;H04B1/10;H04B1/16;H04B1/40;H04B7/12;H04B7/185;H04B7/26;(IPC1-7):H04B1/26 |
主分类号 |
H04B1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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