Abstract: A channel emulator reads a record of captured radio signal data of a group of cellular base stations in a fielded cellular network from a memory. Based on the record of the captured radio signal data, the channel emulator generates a simulation of a radio environment of the fielded cellular network. In one aspect, the simulation generates a number of live cellular base station signals fewer than the group of cellular base stations in the fielded cellular network. In another aspect, a terrain environment model is applied based on the captured radio signal data.

Abstract: A method for receiving spread spectrum signals and for initial code acquisition from the received signals comprises de-spreading the received signals, based on code phase synchronization, to produce a de-spread signal; and performing a modulation detection based on a change of time-domain characteristic of the de-spread signal.

Abstract: A method for receiving spread spectrum signals and for initial code acquisition from the received signals comprises de-spreading the received signals, based on code phase synchronization, to produce a de-spread signal; and performing a modulation detection based on a change of time-domain characteristic of the de-spread signal.

Abstract: A method of performing a fast Fourier transform (FFT) in a single-instruction-stream, multiple-data-stream (SIMD) processor includes providing n-bits of input data, and implementing j number of stages of operations. The n-bits of input data are grouped into groups of x-bits to form i number of vectors so that i=n/x. The method includes parallel butterflies operations on vector [i] with vector [i+(n/2)] using a twiddle factor vector Wt. Data sorting is performed within a processing array if a present stage j is less than y, where y is an integer less than a maximum value of j. The parallel butterflies operations and data sorting are repeated i times, then the process increments to the next stage j. The parallel butterflies operations, data sorting and incrementing are repeated (j?1) times to generate a transformed result and then the transformed result is output.

Abstract: A method of emulating a pointing device button press in a computer includes determining whether a key press input event is detected during a time when a pointer input event is detected, and is so performing a command to emulating a pointing device button click. The method is included in computer software product that includes a computer readable medium in which computer instructions are stored.