There has been some additional development of parts reported in "Multi-Modulator for Bandwidth-Efficient Communication" (NPO-40807), NASA Tech Briefs, Vol. 32, No. 6 (June 2009), page 34. The focus was on 1) The generation of M-order quadrature amplitude modulation (M-QAM) and octonary-phase-shift-keying, trellis-coded modulation (8PSK TCM), 2) The use of square-root raised-cosine pulse-shaping filters, 3) A parallel-processing architecture that enables low-speed [complementary metal oxide/semiconductor (CMOS)] circuitry to perform the coding, modulation, and pulse-shaping computations at a high rate; and 4) Implementation of the architecture in a CMOS field-programmable gate array.
Parallel-Processing CMOS Circuitry for M-QAM and 8PSK TCM
2009-09-01
Miscellaneous
No indication
English
"8PSK Signaling over Non Linear Satellite Channels"
British Library Conference Proceedings | 1997
|Bit Error Rate Performance of Coded 8PSK
British Library Conference Proceedings | 1996
|Bit error rate performance of coded 8PSK
AIAA | 1996
|