Location of interleaver with LDPC code
Concepts and schemes pertaining to location of interleaver with low-density parity-check (LDPC) code are described. A processor of an apparatus encodes data to provide a stream of encoded data. The processor also rate matches the encoded data to provide a rate-matched stream of encoded data. The processor further interleaving the rate-matched stream of encoded data. In rate matching the encoded data, the processor buffers the stream of encoded data in a circular buffer, with the circular buffer functioning as a rate matching block that rate matches the stream of encoded data. In interleaving the rate-matched stream of encoded data, the processor performs bit-level interleaving on the rate-matched stream of encoded data to provide a stream of interleaved data.
1. A method, comprising:
rate matching, by an encoder circuit of a processor of an apparatus, a stream of encoded data;
passing, by the encoder circuit, the stream of encoded data through a bit-level interleaver of the encoder circuit to provide a stream of interleaved data; and
wirelessly transmitting, by a transceiver of the apparatus, the stream of interleaved data to a network node of a wireless network,
wherein the rate matching of the stream of encoded data comprises:
encoding, by a low-density parity-check (LDPC) encoder of the encoder circuit, data to provide the stream of encoded data; and
receiving, by a circular buffer of the encoder circuit, the stream of encoded data from the LDPC encoder, and
wherein the bit-level interleaver and the circular buffer are physically arranged in the encoder circuit such that a location of the bit-level interleaver is after the circular buffer with respect to a flow of the stream of interleaved data to enable a lower complexity of a decoder in the network node receiving the stream of interleaved data compared to a case in which the bit-level interleaver is before the circular buffer with respect to the flow of the stream of interleaved data.
2. The method of claim 1 , wherein the rate matching of the stream of encoded data further comprises:
buffering, by the circular buffer, the stream of encoded data,
wherein the circular buffer functions as a rate matching block that rate matches the stream of encoded data.
3. The method of claim 2 , wherein the circular buffer rate matches the stream of encoded data with a code rate that is used by the decoder at a receiver of the network node to decode data received by the receiver.
4. The method of claim 2 , wherein the passing of the stream of encoded data through the bit-level interleaver comprises:
receiving, by the bit-level interleaver, the stream of encoded data from the circular buffer; and
performing, by the bit-level interleaver, bit-level interleaving on the stream of encoded data to provide the stream of interleaved data.
5. An apparatus, comprising:
a transceiver capable of wireless communications with at least one network node of a wireless network; and
a processor coupled to the transceiver, the processor comprising an encoder circuit that is capable of performing:
encoding data to provide a stream of encoded data; and
performing rate matching and interleaving on the encoded data by:
rate matching the stream of encoded data by buffering the stream of encoded data in a circular buffer of the encoder circuit; and
performing bit-level interleaving, by a bit-level interleaver of the encoder circuit, the rate-matched stream of encoded data to provide a stream of interleaved data,
wherein the bit-level interleaver and the circular buffer are physically arranged in the encoder circuit such that a location of the bit-level interleaver is after the circular buffer with respect to a flow of the stream of interleaved data to enable a lower complexity of a decoder in the network node receiving the stream of interleaved data compared to a case in which the bit-level interleaver is before the circular buffer with respect to the flow of the stream of interleaved data.
6. The apparatus of claim 5 , wherein, in encoding the data to provide the stream of encoded data, the processor performs low-density parity-check (LDPC) encoding on the data to provide the stream of encoded data.
7. The apparatus of claim 6 ,
wherein the circular buffer functions as a rate matching block that rate matches the stream of encoded data.
8. The apparatus of claim 7 , wherein the circular buffer rate matches the stream of encoded data with a code rate that is used by the decoder at a receiver of the network node to decode data received by the receiver.