A new zero-acquisition time spreading/despreading technique for spread-spectrum communication systems

TitleA new zero-acquisition time spreading/despreading technique for spread-spectrum communication systems
Publication TypeConference Paper
Year of Publication1992
AuthorsFair, I. J., Q. Wang, and V. K. Bhargava
Conference NameWireless Communications, 1992. Conference Proceedings., 1992 IEEE International Conference on Selected Topics in
Pagination219 -222
Date Publishedjun.
Keywordsacquisition time, BER performance, bit error rate, correlation techniques, correlator complexity, data signal, delay-and-multiply circuit, direct sequence spread spectrum, DS systems, modulo-2 division, multiplication, quotient, received signal, shift register, spread spectrum communication, spread-spectrum communication systems, system performance, TQ-DS, transmitted-quotient direct sequence, zero-acquisition time spreading/despreading

In direct sequence (DS) spread-spectrum systems, correlation techniques are used to extract information from the received signal. The various correlation procedures used in established DS systems offer a tradeoff between acquisition time, correlator complexity, and system performance. The paper introduces a new spread-spectrum technique which employs an easily implemented spreading/despreading mechanism that despreads the received signal immediately upon its reception. The data signal is spread through modulo-2 division using shift register techniques and despread through multiplication using a delay-and-multiply circuit. Since the sequence transmitted is a quotient, the technique is called transmitted-quotient direct sequence (TQ-DS). Preliminary performance results indicate that the cost of zero-acquisition time and low complexity is a significant degradation in system bit error rate (BER) performance relative to that of established spread-spectrum systems


a place of mind, The University of British Columbia

Electrical and Computer Engineering
2332 Main Mall
Vancouver, BC Canada V6T 1Z4
Tel +1.604.822.2872
Fax +1.604.822.5949

Emergency Procedures | Accessibility | Contact UBC | © Copyright 2020 The University of British Columbia