US 2001/0033612 A1 · Method to determine a channel characteristic, and discrete wavelet transmitter and receiver to perform the method

Abstract

To determine the channel characteristic of a channel (CHANNEL) between a transmitter (TX) and a receiver (RX), a predetermined periodic signal of pulse amplitude modulated symbols is modulated on waveforms by a cosine modulated filter bank (DWMT MOD) in the transmitter (TX), and the waveforms are transmitted over the channel (CHANNEL). In the receiver (RX), the received pulse amplitude modulated symbols are demodulated from the waveforms by a cosine modulated filter bank (DWMT DEMOD), pairs of the received pulse amplitude modulated symbols are combined to form received quadrature amplitude modulated symbols, and the received quadrature amplitude modulated symbols are divided by the transmitted predetermined pulse amplitude modulated symbols considered pairwise as transmit quadrature amplitude modulated symbols. So, samples of the channel characteristic are generated.

Claims5

Dependent claims

Method to determine samples of an estimated channel characteristic of a channel (CHANNEL) between a transmitter (TX) and a receiver (RX), CHARACTERIZED IN THAT said method comprises the steps of:

a. generating a predetermined periodic signal of transmit pulse amplitude modulated symbols;
b. modulating waveforms with said transmit pulse amplitude modulated symbols in a cosine modulated filter bank (DWMT MOD) in said transmitter (TX);
c. transferring said waveforms from said transmitter (TX) to said receiver (RX) over said channel (CHANNEL);
d. demodulating received pulse amplitude modulated symbols from said waveforms in a cosine modulated filter bank (DWMT DEMOD) in said receiver (RX);
e. combining pairs of said received pulse amplitude modulated symbols to form received quadrature amplitude modulated symbols;
and
f. dividing said received quadrature amplitude modulated symbols by said transmit pulse amplitude modulated symbols considered pairwise as transmit quadrature amplitude modulated symbols to thereby generate said samples of said estimated channel characteristic.

4 more elements

Dependencies are inferred from the claim text.

Method to determine a channel characteristic, and discrete wavelet transmitter and receiver to perform the method

Life of this patent

Method to determine a channel characteristic, and discrete wavelet transmitter and receiver to perform the method

Life of this patent

Abstract

Claims5