SS-CDMA flexible wireless network: Approximately synchronized CDMA modem for uplink

S. Kameda, K. Takahashi, H. Nakase, K. Tsubouchi

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


We have proposed an intracell uplink of a spread-spectrum code-division multiple-access (SS-CDMA) flexible wireless network based on approximately synchronized (AS) CDMA. Since the AS-CDMA has no co-channel interference, complicated transmission power control is not required. A modem of the AS-CDMA has been designed and implemented for the Japanese 2.4 GHz industrial, scientific and medical band. Using the implemented modem, the degradation of Eb/N0 from the theoretical limit is 1.0 dB at a bit error rate (BER) of 10-3. Under 2-user environment, the degradation of carrier-to-noise ratio from the case without undesired signal is 0.5 dB at a BER of 10-3 when the desired-to-undesired signal ratio is -20.3 dB.

Original languageEnglish
Pages (from-to)3012-3016
Number of pages5
JournalConference Record - International Conference on Communications
Publication statusPublished - 2001
EventInternational Conference on Communications (ICC2001) - Helsinki, Finland
Duration: 2000 Jun 112000 Jun 14


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