Patent ID: 7697615

Claim:
A method for providing communications in a single-carrier modulation (SCM) system, the SCM system including a transmitter and a receiver, the method comprising: inserting null symbols, by the transmitter of the SCM system, in a transmit sequence of data symbols such that a specified pattern of K data symbols and N−K null symbols is formed in every period of N symbols in the transmit sequence, N and K being positive integers and K being smaller than N; converting, by the transmitter of the SCM system, the transmit sequence into an analog signal; transmitting, by the transmitter, the analog signal over a channel; converting, by the receiver of the SCM system, the analog signal into a receive sequence; and equalizing the receive sequence using a time-varying equalizer of the receiver, the time-varying equalizer having K sets of coefficients, each of the K sets of coefficients being used cyclically.