Downlink physical layer processing in wireless networks with symbol rate mapping

A downlink physical layer processing system, comprising:

• a transport block segmentation processor configured to receive a transport block and to generate segmented blocks from the transport block;
• an encoder configured to encode the segmented blocks to form encoded blocks;
• a mapping processor configured to map the encoded blocks to symbols corresponding to resource elements to generate mapped symbols for transmission over a transmission medium;
• and
• a transmission signal generator configured to process the mapped symbols to generate transmission signals for transmission over the transmission medium;
• and
• a symbol buffer configured to store a predetermined number of symbols, wherein the mapping processor is configured to store the mapped symbols in the symbol buffer, and wherein the transmission signal generator is configured to read the mapped symbols from the symbol buffer;
• wherein the mapping processor is configured to map the encoded blocks to the symbols in response to a control signal generated by the transmission signal generator;
• and
• wherein the mapping processor receives encoded code blocks at a rate that is based on processing of transmission time intervals by the encoder and generates symbols from the encoded code blocks at a rate that is based on a rate at which symbols are processed by the transmission symbol generator to generate the transmission symbols.

A downlink physical layer processing system, comprising:

• an encoder configured to generate encoded blocks from transport blocks;
• a mapping processor configured to map the encoded blocks to symbols for transmission over a transmission medium;
• and
• a transmission signal generator configured to process the symbols to generate transmission signals for transmission over the transmission medium;
• wherein the encoder operates in response to timing of transmission time interval data received by the encoder and the mapping processor operates in response to timing of processing of symbols by the transmission signal generator;
• wherein the transmission symbols comprise orthogonal frequency division multiplexing symbols;
• and
• wherein the mapping processor receives encoded code blocks at a rate that is based on processing of transmission time intervals by the encoder and generates symbols from the encoded code blocks at a rate that is based on a rate at which symbols are processed by the transmission symbol generator to generate the transmission symbols.

A method of operating a downlink physical layer processing system, comprising:

• receiving a transport block;
• generating segmented blocks from the transport block;
• encoding by encoder the segmented blocks to form encoded blocks;
• mapping the encoded blocks to symbols corresponding to resource elements to generate mapped symbols for transmission over a transmission medium;
• and
• processing the mapped symbols to generate transmission signals for transmission over the transmission medium;
• wherein mapping the encoded blocks to the symbols is performed in response to generation of the transmission signals;
• wherein the mapped symbols comprise orthogonal frequency division multiplexing symbols;
• and
• wherein mapping the encoded blocks to symbols is performed at a rate that is based on a rate of processing the mapped symbols to generate transmission signals.