Encoding method for constellation symbols of an RF transmitter

Details Encoding method for constellation symbols of an RF transmitter Encoding method for constellation symbols of an RF transmitter

1993-02-16

1998-04-28

Tse, Young T.

Pulse or digital communications

Transmitters

Angle modulation

375298, 332103, H04L 2720, H04L 2736

Patent

active

057455279

ABSTRACT:
A method and apparatus is provided for encoding a signal within a radio frequency transmitter 10. The method includes the steps of dividing an information bit stream into a set of successive representations of constellation symbols, each with a symbol interval and finite impulse response filtering each constellation symbol of the set of successive representations of constellation symbols to produce at least one filtered symbol sample per symbol interval. The method further includes the steps of vector adding the at least one filtered symbol sample per symbol interval of the set of successive representations of constellation symbols to produce an output constellation symbol. An apparatus is provided with means for implementing the steps of the method. Included within the apparatus is a low-overhead means of selecting modulation method.

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patent: 5260673 (1993-11-01), Phan
Digital Signal Processor--Based Programmable BPSK/QPSK/Offset--QPSK Modems, by L. N. Lee, A Shenoy, and M. K. Eng., COMSAT Technical Review, vol. 19, No. 2. Fall, 1989, pp. 195-233.

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