Transmitter system and method of operation therefor

Details Transmitter system and method of operation therefor Transmitter system and method of operation therefor

1998-04-06

2000-12-05

Chin, Stephen

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

375299, 455101, 455102, H04L 2736, H04L 2704, H03C 702, H04B 102

Patent

active

061576816

ABSTRACT:
A transmitter system (18) which transmits a communication signal (14) through a phased-array antenna (10) uses a signal processor (26) and a multiplicity of direct modulators (30). Each direct modulator (30) drives a single element (12) of the antenna (10). Each direct modulator (30) receives a digital baseband phase point data signal (62) from a digital data stream (28). The digital data stream (28) also conveys digital beam formation data (60). Each direct modulator (30) digitally combines the baseband phase point data (62) with the beam formation data (60) to produce digital streams that modulate an RF carrier signal (34). The digital data stream (28) is generated by a phased-array signal processor (26) which processes user data bits (86) received from any number of input signals (22) and processes beam signals (24). In one embodiment, the signal processor (26) calculates phase point data (62) representative of all input signals (22).

REFERENCES:
patent: 5649287 (1997-07-01), Forssen et al.
patent: 5832044 (1998-11-01), Sousa et al.
patent: 5909460 (1999-06-01), Dent

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