Patent ID: 7729433

Claim:
A method of wireless transmission from a mobile unit to a base station, comprising: multiplexing a pilot signal and a data signal, wherein the data signal operates at a data rate, comprising: splitting the data signal into a plurality of data streams; spreading the plurality of data streams and the pilot signal using plurality of orthogonal Walsh codes; applying a data gain to the plurality of data streams; applying a pilot gain to the pilot signal, wherein the data gain and the pilot gain are a function of the data rate such that increasing the data rate causes the pilot gain to decrease and the data gain to increase and decreasing the data rate causes the pilot gain to increase and the data gain to decrease; combining the plurality of data streams and the pilot signal into a multiplexed signal containing both the pilot signal and the data signal; allocating the multiplexed signal to a subset of sub-carriers; and transmitting the subset of sub-carriers using Discrete Fourier Transform Spread OFDMA.