Panasonic Communications Co., Ltd.

Panasonic System Networks Co., Ltd.

Toshiyuki Ougi

Nobuhiko Noma

Mikio Mizutani

The present invention calculates a difference between present sampling data and sampling data one data unit ahead, cumulatively adds up difference values calculated for every sampling by going back to the time point ahead by the number of samples of a cyclic prefix signal inserted into an initializing signal and confirms the position of the cyclic prefix signal from the sample number for which this cumulative value indicates a minimum value.

Modem apparatus, communication apparatus and communication control method

A training circuit for training a tap coefficient of an adaptive equalizer that performs error calculations in a training process and updating of the tap coefficient in a time area and thereby makes the tap coefficient converge stably in a short time.

Adaptive equalizer training circuit, modem apparatus and communication apparatus

The present invention calculates a product of the present sampling data by the sampling data one data unit ahead through a multiplier, adds up product values calculated for every sampling by adding product values calculated from previous samples occurring one data unit in advance through an adder and detects a reference timing with regard to a CP (cycle prefix) signal using the addition value.

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Tokyo, Japan

Toshiyuki Ougi