Orthogonal division multiple access technique incorporating single carrier and OFDM signals

A transmitter of claim 11, where the time-domain repetition effect is achieved by repetitively copying same set of signal samples.

A transmitter of claim 11, where the time-domain repetition effect is achieved by filling a frequency-domain array of values at equally spaced locations and performing a Fourier transform

The transmitter of claim 22, where the frequency offset is achieved by placing the values into the frequency-domain array at equally spaced locations offset from the center.

The transmitter of claim 11, where a Numerically Controlled Oscillator (NCO) generates the carrier frequency offset.

The transmitter of claim 11, where the repeated data-carrying signal segment is a single carrier signal modulated with ASK, PSK, QAM, OQPSK, OQAM, MSK or CPFSK modulation.

The transmitter of claim 11, where the repeated data-carrying signal segment is an OFDM signal.

The transmitter of claim 11, where the segmentation-repetition-frequency offset process is performed on multiple transmit channels.

A multiple access communication system in which the transmitters are capable of generating the transmitted signals according to the method of either claim 66 (repeated single carrier) or claim 77 (repeated OFDM), in which each transmitter is assigned a repetition factor and a frequency offset.

A multiple access communication system of claim 99, some transmitters are capable of generating OFDMA signals with arbitrarily chosen set of subcarriers.

A multiple access communication system of claims 99 or 1010, in which the transmitters are directed to use either of the modulation methods according to channel conditions.

A system of claim 1111, in which the subcarrier set is hierarchically partitioned into smaller sets, and in which subcarrier sets are dynamically assigned to users according to resource allocation policy.