Title:
【発明の名称】M元FSK信号用の受信機
Document Type and Number:
Japanese Patent JPH10513032
Kind Code:
A
Abstract:
A method of, and receiver for, receiving and demodulating M-ary FSK symbols, where M equals two or four, comprising over sampling a received signal to obtain sub-symbols which are treated as repeated DBPSK pi /4DQPSK symbols, respectively. The sub-symbols are applied to a delay and multiply demodulator in which the duration of the delay has been optimised to give M equidistant points on a unit circle. The output from the demodulator comprises log likelihood ratios which are then integrated in an integrating filter to give a maximum likelihood estimate of the bits comprising the symbols transmitted.
Inventors:
Razel, Charles JH
Application Number:
JP51954397A
Publication Date:
December 08, 1998
Filing Date:
November 13, 1996
Export Citation:
Assignee:
Philips Electronics N
International Classes:
H04L27/14; H04L27/156; H04L27/22; (IPC1-7): H04L27/14; H04L27/22
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)