Method and system for data-rate control by randomized bit-puncturing in communication systems

An apparatus, comprising non-transitory computer readable media for implementing:

• a first constituent encoder implemented to encode an information block thereby generating a plurality of systematic bits and a plurality of first parity bits;
• an interleaver implemented to interleave the information block thereby generating interleaved information;
• a second constituent encoder implemented to encode the interleaved information thereby generating a plurality of second parity bits;
• wherein the plurality of systematic bits, the plurality of first parity bits, or the plurality of second parity bits forming an encoded group;
• a rate matching module implemented to:
• process the encoded group, in accordance with a predetermined rate parameter indicating a number of bits to be punctured from the encoded group, to partition the encoded group into a plurality of remaining bits and a plurality of punctured bits such that the plurality of remaining bits are output from the rate matching module;
• if the number of bits to be punctured from the encoded group including fewer bits than a number of remaining bits that are unpunctured, select the number of remaining bits;
• if the number of bits to be punctured from the encoded group including more bits or an equal number of bits than the number of remaining bits that are unpunctured, select the number of punctured bits;
• generate a grid distance based on a ratio of a number of bits of the encoded group divided by the selected number of remaining bits or the selected number of punctured bits;
• generate a plurality of pointers based on the grid distance;
• generate a plurality of random displacements such that each random displacement within the plurality of random displacements corresponding to one pointer within the plurality of pointers;
• and
• generate a plurality of final addresses using the plurality of pointers and the plurality of random displacements;
• and wherein:
• if the number of bits to be punctured from the encoded group including fewer bits than a number of remaining bits that are unpunctured, then:
• the plurality of final addresses corresponding to the plurality of punctured bits;
• the plurality of remaining bits are being identified as unaddressed by the plurality of final addresses;
• and
• the identified, plurality of remaining bits being output;
• or
• if the number of bits to be punctured from the encoded group including more bits or an equal number of bits than the number of remaining bits that are unpunctured, then the plurality of final addresses corresponding to the plurality of remaining bits that are output;
• the plurality of remaining bits output by the rate matching module undergoing modulation to generate a signal that comports with a communication channel;
• and
• the signal launched into the communication channel.

A method for operating a communication device, the method comprising:

• encoding at least one information bit thereby generating an encoded frame;
• processing the encoded frame, in accordance with a predetermined rate parameter indicating a number of bits to be punctured from the encoded frame, to partition the encoded frame into a plurality of remaining bits and a plurality of punctured bits such that the plurality of remaining bits are output from the rate matching module;
• if the number of bits to be punctured from the encoded frame including fewer bits than a number of remaining bits that are unpunctured, selecting the number of remaining bits;
• if the number of bits to be punctured from the encoded frame including more bits or an equal number of bits than the number of remaining bits that are unpunctured, selecting the number of punctured bits;
• generating a grid distance based on a ratio of a number of bits of the encoded frame divided by the selected number of remaining bits or the selected number of punctured bits;
• generating a plurality of pointers based on the grid distance;
• generating a plurality of random displacements such that each random displacement within the plurality of random displacements corresponding to one pointer within the plurality of pointers;
• generating a plurality of final addresses using the plurality of pointers and the plurality of random displacements;
• if the number of bits to be punctured from the encoded frame including fewer bits than a number of remaining bits that are unpunctured, then:
• the plurality of final addresses corresponding to the plurality of punctured bits;
• the plurality of remaining bits are identified as being unaddressed by the plurality of final addresses;
• and
• outputting the identified, plurality of remaining bits;
• or
• if the number of bits to be punctured from the encoded frame including more bits or an equal number of bits than the number of remaining bits that are unpunctured, then the plurality of final addresses corresponding to the plurality of remaining bits, outputting the identified, plurality of remaining bits;
• modulating the plurality of remaining bits to generate a signal that comports with a communication channel;
• and
• launching the signal into the communication channel coupled to the communication device.