Patent ID: 6587452
Filing Date: 2003-07-01
Classification: H03G,H04W

Abstract:
A packet transmitter or communicating data, comprising:a demultiplexer, coupled to a data input and having a plurality of outputs, for demultiplexing the data into a plurality of sub-data-sequence signals, with a respective sub-data-sequence signal at a respective output of said demultiplexer; chip-sequence means for outputting a plurality of chip-sequence signals, with each chip-sequence signal orthogonal to the other chip-sequence signals in said plurality of chip-sequence signals; a plurality of product devices, coupled to the plurality of outputs of said demultiplexer, respectively, and to said chip-sequence means, for multiplying each of the sub-data-sequence signals by a respective chip-sequence signal, thereby generating a plurality of spread-spectrum channels; a combiner, coupled to the plurality of product devices, for algebraically combining the plurality of spread-spectrum channels as a multichannel-spread-spectrum signal; a header device, coupled to said combiner, for concatenating a header for chip-sequence synchronization, to the multichannel-spread-spectrum signal, thereby generating a packet-spread-spectrum signal having a first signal segment and a second signal segment; a mapping memory, having an address port coupled to said combiner, and an input port for inputting mapping characteristics of the first signal segment of the packet-spread-spectrum signal and mapping characteristics of the second signal segment of the packet-spread-spectrum signal, said mapping memory, responsive to the first signal segment present at the address port, for mapping the first signal segment at a power level, said mapping memory, responsive to the second signal segment present at the address port, for mapping the second signal segment at the power level, thereby maintaining a constant value of the power level for the second signal segment and the first signal segment of the packet-spread-spectrum signal; and a transmitter subsystem, coupled to said mapping memory, for transmitting on a carrier frequency the packet-spread-spectrum signal using radio waves over a communications channel.