국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Parallel-Processing CMOS Circuitry for M-QAM and 8PSK TCM
저자	Gray, Andrew;; Lee, Dennis;; Hoy, Scott;; Fisher, Dave;; Fong, Wai;; Ghuman, Parminder
Keyword	PARALLEL PROCESSING (COMPUTERS); FIELD-PROGRAMMABLE GATE ARRAYS;; PHASE SHIFT KEYING;; MODULATORS;; CIRCUITS;; QUADRATURE AMPLITUDE MODULATION;; NASA PROGRAMS;; LOW SPEED;;
URL	http://hdl.handle.net/2060/20090032071
보고서번호	NPO-40809
발행년도	2009
출처	NTRS (NASA Technical Report Server)
ABSTRACT	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 ƘPSK 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.