Title :
A DSSS receiver for dual-mode DSSS/OFDM wireless LAN systems
Author :
Hsiao, Frank H. ; Guo, Jin-Hwa ; Lo, Shih-Lin ; Hsu, Terng-Yin
Author_Institution :
Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
This paper introduces a DSSS baseband receiver suitable for a dual mode DSSS/OFDM wireless LAN system. Packet synchroniser with a pair of ADCs with dynamic sampling is used for detecting both DSSS and OFDM packets. For differentially encoded symbols, frequency offset and phase offset can be compensated based on their inherent characteristics. For high data rate DSSS based modulations, channel estimation and equalization with receive diversity combining in frequency domain is applied to resolve the multipath distortions. With channel equalization and diversity combining of the DSSS receiver achieved in frequency domain the overall complexity of the dual mode DSSS/OFDM equalization can be realized.
Keywords :
OFDM modulation; analogue-digital conversion; channel estimation; code division multiple access; diversity reception; frequency-domain analysis; multipath channels; radio receivers; signal sampling; spread spectrum communication; synchronisation; wireless LAN; ADC; DSSS baseband receiver; DSSS based modulation; analog-digital converter; channel equalization; channel estimation; direct sequence spread spectrum; diversity combining; dual mode DSSS-OFDM system; dynamic sampling; encoded symbol; frequency domain; local area network; multipath distortion; packet synchroniser; wireless LAN system; Baseband; Clocks; Diversity reception; Frequency synchronization; OFDM; Phase detection; Phase frequency detector; Sampling methods; Spread spectrum communication; Wireless LAN;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618084
