Paper Info
Title
Chip-Interleaved Multi-Rate Cdma With 2-Dimensional Ovsf Spreading
Abstract
Chip interleaving technique has been proposed for DS-CDMA to eliminate the multiple-access interference (MAI). In this paper, we develop this technique to provide the single- or multicarrier CDMA with flexible low-to-high bit rate transmission by jointly using 2-dimensional (2D) OVSF spreading and chip interleaving for quasi-synchronous uplink transmissions in time- and frequency-selective fading channels. Through appropriate design of 2D spreading code assignment, not only the maximum time- and frequency-domain diversity can be achieved but also users are equipped with multi-rate services. The complexity of receivers is greatly reduced since single-user frequency-domain equalization (FDE) based on the MMSE criterion can he applied for signal detection. Computer simulation results show that the multi-rate transmission is possible for the 2D OVSF spread/chip-interleaved CDMA uplink and the bit error rate (BER) performance with turbo coding is very robust against Doppler spread.
Year
DOI
Venue
2006
10.1109/VETECS.2006.1683150
2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6
Keywords
Field
DocType
CDMA, multi-rate, uplink transmission, chip interleaving, 2-dimensional OVSF spreading
Fading,Computer science,Turbo code,Electronic engineering,Chip,Code division multiple access,Interleaving,Telecommunications link,Bit error rate,Spread spectrum
Conference
ISSN
Citations 
PageRank 
1550-2252
3
0.51
References 
Authors
5
2
Name
Order
Citations
PageRank
Le Liu17011.08
Fumiyuki Adachi21588195.77