Design and implementation of intracell reverse link using approximately synchronized CDMA

S. Kameda, K. Takahashi, T. Kamata, J. S. Cha, H. Nakase, K. Masu, K. Tsubouchi

Research output: Contribution to conferencePaperpeer-review

4 Citations (Scopus)

Abstract

We have proposed an intracell reverse link of an SS-CDMA flexible wireless network based on an approximately synchronized (AS) CDMA. The AS-CDMA features no co-channel interference during a guard-chip duration. A sequence with the guard-chip duration can be designed using the pseudo periodic method and the orthogonal frequency multi-channel method. The reverse link without co-channel interference does not require the sophisticated transmission power control, which is indispensable in the conventional systems such as IS-95. The AS-CDMA modem has been designed and implemented for the Japanese 2.4 GHz SS band. An AS-CDMA sequence of length 48 is designed. The number of orthogonal frequency multi-channel method is 2. One of the features of the implemented reverse link modem is the use of surface-acoustic-wave convolver as a correlator for rapid synchronization. The effects of frequency offset on stability have been evaluated using computer simulation. The simulation results have shown that the degradation of Eb/N0 at a BER of 10-4 is 1.4 dB, when the carrier frequency offset of an undesired signal is ±1 ppm and the desired-undesired signal power ratio is -30 dB. In the implemented AS-CDMA reverse link modem, the measured degradation of Eb/N0 has been found to be 3.0 dB at a BER of 10-4.

Original languageEnglish
Pages256-260
Number of pages5
Publication statusPublished - 2000 Dec 1
Event11th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2000) - London, United Kingdom
Duration: 2000 Sep 182000 Sep 21

Other

Other11th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2000)
CountryUnited Kingdom
CityLondon
Period00/9/1800/9/21

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Design and implementation of intracell reverse link using approximately synchronized CDMA'. Together they form a unique fingerprint.

Cite this