Patent ID: 7424009

Claim:
A method of mapping chips of a spread out symbol to sub-channels of a group of sub-channels of a Multi-Carrier transmission channel of a Multi-Carrier transmission network, comprising: forming the spread out symbol by multiplying a data item to be transmitted by elements of a spreading sequence; and modulating the mapped chips using an orthogonal frequency division multiplexing modulation, each sub-channel of the Multi-Carrier transmission channel being defined by a carrier frequency of the Multi-Carrier transmission channel and a time slot in which an orthogonal frequency division multiplexing symbol is transmitted, wherein the group of sub-channels comprise sub-channels having at least two different frequencies and at least two different time slots, the chips are ordered in a predetermined order, a first chip is mapped to a sub-channel and each following chip is mapped to a sub-channel having a same carrier frequency or a same time slot as the sub-channel to which an immediately previous chip was mapped, and wherein a number of sub-channels in the group of sub-channels is equal to a number of chips of the spread out symbol.