TRANSMISSION LINE CHARACTERISTIC ESTIMATION METHOD, INTERPOLATION ESTIMATION METHOD, TRANSMISSION LINE CHARACTERISTIC ESTIMATION APPARATUS, INTERPOLATION ESTIMATION UNIT, POLYPHASE DFT RATIO COMPUTATION APPARATUS, MATRIX COMPUTATION APPARATUS, AND IMPULSE RESPONSE COMPUTATION APPARATUS

摘要

PPROBLEM TO BE SOLVED: To perform the blind estimation of transmission line characteristics accurately and efficiently. PSOLUTION: A target is digital communication which takes an information symbol sequence of a fixed length as a unit of blocks and transmits each information symbol at a certain time interval T. A short-time interval sampling part 20 generates a receiving signal sampling the signal at a T/M time interval on the receiving side where M is 2 or a larger integer. An interpolation estimation unit 22 uses smooth waveforms obtained by sampling a transmission line impulse response including a transmitting/receiving filter at a short-time interval and an interpolation formula, and estimates the impulse response based on the receiving signal obtained by the short-time interval sampling part 20. PCOPYRIGHT: (C)2009,JPO&INPIT