Subscriber unit for wireless digital subscriber communication sy

Details Subscriber unit for wireless digital subscriber communication sy Subscriber unit for wireless digital subscriber communication sy

1997-06-24

1999-01-12

Tse, Young T.

Pulse or digital communications

Miscellaneous

711 3, H04L 2300

Patent

active

058598839

ABSTRACT:
A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice input signal to provide digital input symbols; demodulates an output signal received from the base station to provide digital output symbols; and synthesizes a digital voice output signal from the digital output symbols. The FIR chip FIR filters the digital input symbols and generates timing signals for timing the transcoding and synthesizing operations in the processor chip. The DIF chip digitally synthesizes a digital intermediate frequency signal by direct digital synthesis (DDS) and modulates the digital intermediate frequency signal with the filtered input symbols to provide a modulated intermediate frequency input signal. The radio further processes the modulated input signal for transmission to the base station.

REFERENCES:
patent: 4123774 (1978-10-01), Hjortzberg
patent: 4404532 (1983-09-01), Welti
patent: 4644561 (1987-02-01), Paneth
patent: 4672634 (1987-06-01), Chung et al.
patent: 4675882 (1987-06-01), Lillie
patent: 4689804 (1987-08-01), Srinivasagopalan et al.
patent: 4754340 (1988-06-01), Nakagawa et al.
patent: 4764940 (1988-08-01), Paneth et al.
patent: 4777633 (1988-10-01), Fletcher et al.
patent: 4811420 (1989-03-01), Avis et al.
patent: 4825448 (1989-04-01), Critchlow et al.
patent: 4873500 (1989-10-01), Genrich
patent: 4881240 (1989-11-01), Critchlow et al.
patent: 4893316 (1990-01-01), Janc et al.
patent: 4893317 (1990-01-01), Critchlow et al.
patent: 4905177 (1990-02-01), Weaver, Jr. et al.
patent: 4926130 (1990-05-01), Weaver
patent: 4962510 (1990-10-01), McDavid et al.
patent: 4965533 (1990-10-01), Gilmore
patent: 4985684 (1991-01-01), Jentz et al.
patent: 4998072 (1991-03-01), Sheffer
patent: 5008900 (1991-04-01), Critchlow et al.
patent: 5028887 (1991-07-01), Gilmore
patent: 5045817 (1991-09-01), Sheffer
patent: 5073869 (1991-12-01), Bjerede
patent: 5091850 (1992-02-01), Culley
patent: 5247642 (1993-09-01), Kadlec et al.
patent: 5325504 (1994-06-01), Tipley et al.
patent: 5335335 (1994-08-01), Jackson et al.
patent: 5369753 (1994-11-01), Tipley et al.
patent: 5426765 (1995-06-01), Stevens et al.
patent: 5446863 (1995-08-01), Stevens et al.
patent: 5581727 (1996-12-01), Collins et al.
Twenty Second Asilomar Conference on Signals, Systems and Computers; vol. 1, pp. 199-203; J.Gray et al.
International Conference on Mobile Radio Systems Techniques; pp. 6-10 J. Masterton et al.
IEEE Proceedings, Physical Science Measurement and Instrumentation Management and Education; Part 132, pp. 425-432, P.D. White.
IEEE International Symposium on Circuits and Systems; 1988, vol. 2, pp. 1803-1810, E. Kuisma et al.

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