Title :
Transmit pulse shaping filters and CORDIC algorithm based precompensation for digital satellite communications
Author :
Vanderaar, Mark ; Bexten, Ronald
Author_Institution :
NYMA Inc., Brookpark, OH, USA
Abstract :
The design and architectural implementation of low complexity pulse shaping filters and algorithmic precompensation for satellite communications transmitters is presented. A lookup table (LUT) approach is used to implement the pulse shaping that provides good spectral efficiency with low implementation loss. A COordinate Rotation Digital Computer (CORDIC) algorithm technique is use to implement the precompensation, resulting in a reduction of the deleterious effects of channel nonlinearities. An architecture for adaptive precompensation is also presented. Issues including number representation, BER performance, and Programmable Logic Devices (PLDs) complexity are discussed. Emphasis is placed on low complexity techniques to enable throughput rates in the tens of megabits per second using today´s PLDs
Keywords :
FIR filters; adaptive signal processing; compensation; digital arithmetic; digital communication; digital filters; error statistics; programmable logic devices; pulse shaping circuits; radio transmitters; satellite communication; table lookup; BER performance; CORDIC algorithm based precompensation; LUT approach; PLD complexity; adaptive precompensation; bit error rate; channel nonlinearities; digital satellite communications; lookup table; low complexity techniques; programmable logic devices; transmit pulse shaping filters; transmitters; Algorithm design and analysis; Bit error rate; Computer architecture; Filters; Programmable logic devices; Pulse shaping methods; Satellite communication; Table lookup; Throughput; Transmitters;
Conference_Titel :
Circuits and Systems, 1996., IEEE 39th Midwest symposium on
Conference_Location :
Ames, IA
Print_ISBN :
0-7803-3636-4
DOI :
10.1109/MWSCAS.1996.593119
