Orthogonal code division multiplex cck (ocdm-cck) method and apparatus for high data rate wireless lan

An Orthogonal Code Division Multiplexing CCK (OCDM-CCK) wireless transceiver transmitting method, the method including:

• Digital Signal Processing (DSP) for serial-to-parallel data conversion, to convert a stream of M*n-bit serial digital data stream into n-bit parallel data segments in ‘M’ parallel baseband channels, for integer values of ‘M’ and ‘n’;
• DSP for data encoding, to encode the said parallel data segments into a plurality of symbols simultaneously in parallel paths according to a Complementary Code Keying (CCK) scheme;
• DSP for CCK modulation, to modulate the said data segments on distinct orthogonal and/or near-orthogonal complementary coded signals;
• DSP for signal summing, to sum the said CCK coded signals at baseband frequency to result in a composite signal, and
• DSP for modulation to modulate the said composite signal on an RF carrier for transmission via a wireless communication channel.

An Orthogonal Code Division Multiplexing CCK (OCDM-CCK) wireless transceiver receiving method, the method including:

• receiving RF (Radio Frequency) DSSS (Direct Sequence Spread Spectrum) signals;
• frequency conversion, to down-convert received RF signals to baseband frequency for Digital Signal Processing (DSP);
• DSP for signal power splitting, which splits the baseband signal into a plurality of parallel channels paths;
• DSP for cross correlation detection dedicated to the channel path to detect the CCK symbol present in that path by using a dedicated CCK codelist;
• DSP for dedicating specific CCK codelists to each channel path for the purpose of crosscorrelation;
• DSP for detection of the specific CCK symbol present in that channel path by crosscorrelation using stored CCK sequences of the said specific CCK codelist;
• DSP for demodulation of CCK sequence present in each path to recover data segment in that path;
• DSP for decoding the CCK sequence present in each path to recover data in each path;
• DSP for recovering data segments in all the parallel paths using stored CCK look-up tables;
• and
• DSP for converting parallel data signals to serial data signal output.