Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1996-09-25
1999-06-29
Faile, Andrew I.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455561, H04B 126
Patent
active
059181699
ABSTRACT:
A method and apparatus for providing a homodyne cellular base station. A cellular antenna is coupled to both a conventional signal channel receiver a homodyne receiver. The conventional single channel receiver is configured to receive the control channel from a cellular band signal. The homodyne receiver utilizes a quadrature downconverter and local oscillator to receive the voice channels. The local oscillator is tuned to the frequency of the control channel to limit all DC offsets to the control channel within the homodyne receiver. All DC offsets and the control channel frequency are filtered from the homodyne receiver signal and, the filtered signal is then digitized and digitally processed to separate the signal into each of the traffic channels.
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Leyonhjelm, Scott A. and Faulkner, Michael, Dr., "Digital Signal Processing and Direct Conversion for Multichannel Transmitters", IEEE Transactions on Communications, 1994.
Ericsson Inc.
Faile Andrew I.
Le Vu
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