Multiple user digital receiver apparatus and method with time di

Details Multiple user digital receiver apparatus and method with time di Multiple user digital receiver apparatus and method with time di

1996-12-12

1999-02-09

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

370478, 370488, 375350, H04J 100

Patent

active

058704027

ABSTRACT:
A digital receiver apparatus and method, designed for multiple simultaneous users, digitizes a received analog RF signal and tunes to multiple desired frequencies of the received signal on a time division multiplexed basis. After filtering by a finite impulse response (FIR) filter that also operates in time division multiplexing for multiple service bands, the selected signals are digitally demodulated and signal processed, again on a time-shared basis. Different service bands are accommodated at the same time by separate FIR filters, each including a coefficient memory for its particular service band. The multiplexed frequency signal for each band is multiplied by the coefficients of its respective FIR filter memory in a common complex multiplier. The results are demultiplexed and directed to respective accumulators for decimation in accordance with the FIR coefficient characteristics.

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