Title:
送信方法、通信方法、及び送信信号のデータ構造
Document Type and Number:
Japanese Patent JP3777466
Kind Code:
B2
Abstract:
A coefficient sequence of a spreading sequence is sequentially shifted one pitch at a time, transmission data is multiplied by a plurality of coefficient sequences to produce a plurality of transmission data, and the plurality of produced transmission data are added up to produce a transmission data sequence. Alternatively, the coefficient sequence of the spreading sequence is multiplied by the transmission data, the result is sequentially shifted one pitch at a time, and a plurality of transmission data are added up to produce a transmission data sequence. Transmission data is multiplied by the coefficient sequence of a spreading sequence to produce a finite-length signal and this finite-length signal is repeated an infinite number of times to produce an infinite-length signal. Transmission data, which is longer than the coefficient sequence, is cut out from this infinite-length signal to produce a transmission data sequence. This makes it possible to include transmission data into a spreading sequence and, therefore, when the transmission data is modulated through spread spectrum, an increase in the amplitude of a signal is reduced and the dynamic range of an amplifier on the receiving side is reduced.
Inventors:
Naoki Suehiro
Application Number:
JP2004532771A
Publication Date:
May 24, 2006
Filing Date:
August 29, 2003
Export Citation:
Assignee:
Yokohama TRL Co., Ltd.
Naoki Suehiro
Naoki Suehiro
International Classes:
H04B1/707; H04J13/22
Domestic Patent References:
| JP4351130A |
Other References:
日熊 啓介 外3名,時間拡散信号上でのマルチパス特性行列を用いた高効率無線周波数利用方式のシミュレーション,電子情報通信学会技術研究報告,2001年 6月22日,Vol.101 No.128,pp.21-27,SST2001-20
Robert L. ,Polyphase Complementary Codes,IEEE Transaction on Information Theory,IEEE,1980年11月,Vol. IT-26 No.6,pp.641-647
Imoto, T. et.al.,Simulation of multipath-tolerant binary signal design for approximately synchronized CDMA mobile com,Computers and Communications, 1999. Proceedings. IEEE International Symposium on,IEEE,1999年 7月 8日,pp.317-323
Robert L. ,Polyphase Complementary Codes,IEEE Transaction on Information Theory,IEEE,1980年11月,Vol. IT-26 No.6,pp.641-647
Imoto, T. et.al.,Simulation of multipath-tolerant binary signal design for approximately synchronized CDMA mobile com,Computers and Communications, 1999. Proceedings. IEEE International Symposium on,IEEE,1999年 7月 8日,pp.317-323
Attorney, Agent or Firm:
Akio Shionoiri