Demodulation and despreading from frequency samples

Shunichiro Egami, Katsumi Sugiyama

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

By the advent of the fast DSP, now, it is possible to change whole over 100MHz bandwidth to frequency samples. This paper propose methods of PSK demodulation and CDMA despreading both starting from frequency samples. PSK signal frequency samples are selected from the whole frequency samples which covers total beam bandwidth. After selecting frequency samples, samples are decimated to appropriate lower rate. Then, frequency samples are transformed to time samples by IFFT. Time samples are squared and transformed again to frequency samples. The first and the second peaks are used to recover carrier information. In case of CDMA, frequency domain correlation method is applied. The code for despreading is transformed to frequency samples by FFT. Then fast correlation method is applied to despreading or despreading synchronization.

本文言語English
ホスト出版物のタイトル21st International Communications Satellite Systems Conference and Exhibit
出版ステータスPublished - 2003 12 1
外部発表はい
イベント21st International Communications Satellite Systems Conference and Exhibit, ICSSC 2003 - Yokohama, Japan
継続期間: 2003 4 152003 4 19

出版物シリーズ

名前21st International Communications Satellite Systems Conference and Exhibit

Other

Other21st International Communications Satellite Systems Conference and Exhibit, ICSSC 2003
国/地域Japan
CityYokohama
Period03/4/1503/4/19

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 信号処理
  • 大気科学
  • 電子工学および電気工学
  • メディア記述

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