Method for estimating a channel, and a receiver

Details Method for estimating a channel, and a receiver Method for estimating a channel, and a receiver

1995-09-11

1998-02-03

Chin, Stephen

Pulse or digital communications

Testing

H04B 346

Patent

active

057152799

ABSTRACT:
The invention relates to a method for estimating a channel in a receiver of a cellular radio system, and a receiver receiving a signal which contains transmission of one or more users and comprising means (20) for filtering the received signal with a filter matched with the waveform of the signal, and means (20) for estimating the delays and amplitudes of the strongest received signal components from the filtered signal. In order to estimate a channel with a high accuracy, the receiver according to the invention comprises means (23) for estimating and extracting always the next strongest signal component from the signal, until all components have been estimated, and means (24, 25) for extracting from the received signal the signals interfering the most with the strongest signal component of each user, and means (24, 25) for estimating again the strongest signal component, and means (24, 25) for estimating and extracting from the signal always the next strongest signal component, until all components have been estimated.

REFERENCES:
patent: 3855423 (1974-12-01), Brendzel et al.
patent: 4457007 (1984-06-01), Gutleber
patent: 5218619 (1993-06-01), Dent
patent: 5325394 (1994-06-01), Bruckert
Chapter 12.6: Sequential LMMSE Estimation, Steven M. Kay: "Fundamentals of Statistical Signal Processing: Estimation Theory", Prentice-Hall, 93.
Finnish Patent Application No. 944202 and English Translation thereof.
Finnish Office Action and English Translation thereof, dated Jun. 30, 1995, Nokia Telecommunications Oy, Application No. 944203.

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