摘要:
A transmitter in a Digital Subscriber Line (DSL) system includes a rate encoder configured to generate a first set of encoded bits using a set of least significant bits, a trellis shaper configured to generate a second set of encoded bits using a most significant bit and the first set of encoded bits, a first constellation mapper configured to generate a first point described by integer coordinates in a complex plane based on the first set of encoded bits obtained from the rate encoder, a second constellation mapper configured to generate a second point described by integer coordinates in the complex plane after interleaving two bits from the second set of encoded bits obtained from the trellis shaper, and a merger module configured to merge the first point with the second point to generate a symbol. The symbol represents a third point described by integer coordinates in the complex plane.
摘要:
Disclosed is a broadcasting signal transmitter. A broadcasting signal transmitter, according to one embodiment of the present invention, comprises: a BICM encoder, which encodes signaling information and a plurality of PLPs, which include components of a broadcasting service; a frame builder, which generates a frame that includes the encoded signaling information and plurality of PLPs; and an OFDM generator, which transmits a broadcasting signal that includes the frame, wherein the signaling information includes first signaling information, which includes information necessary to decode second signaling information, and second signaling information, which includes information necessary to decode the PLPs, and the frame includes a preamble area and a data symbol area.
摘要:
Embodiments of the present invention relate to the field of communications, and provide a decoding method and a decoder, which are used to reduce decoding complexity. The method includes: receiving a to-be-decoded signal; performing region decision on the to-be-decoded signal according to a region decision rule formed by S region decision formulas, to acquire a region decision result; acquiring N constellation points according to the decision result, where the N constellation points are separately constellation points that are in the N subsets and that are closest to the to-be-decoded signal; acquiring N non-encoded bits corresponding to the N constellation points, and branch metrics between the to-be-decoded signal and the N constellation points; and performing Viterbi decoding based on the branch metrics and the N non-encoded bits, and outputting a decoding result corresponding to the to-be-decoded signal. The present invention is applicable to a signal decoding scenario.
摘要:
System and method embodiments are provided for Trellis Coded Quantization (TCQ) based channel feedback. The embodiments provide full channel state information with a short feedback size to a scheduler in order for the scheduler to apply advanced beamforming schemes, such as those designed in non-linear precoder methods. In an embodiment, a method in a station for providing channel feedback to a transmission point (TP) in a wireless system includes receiving a signal from the TP; estimating channel parameters for the signal; applying a TCQ scheme to the estimated channel parameters to map the channel estimate parameters to trellis codes; and transmitting full channel state information to the TP, wherein the full channel state information comprises output of a Viterbi algorithm (VA) corresponding to the trellis codes.
摘要:
Techniques herein support enhanced multi-rate encoding and decoding of signals in multiple formats. In one embodiment, input data is received at a first device at one of a plurality of data rates. Encoder units are activated to produce streams of encoded input data. The encoder units are configured to operate at the same data rate. Differential encoding operations are performed to produce an encoded output stream. The encoded output stream is modulated for transmission to a second device. In another embodiment, a first device receives an encoded data stream that is transmitted from a second device. The modulated data stream includes encoded data at one of a plurality of data rates. Differential decoding is performed on the encoded data by activating one or more of a plurality of decoder units, where each of the plurality of decoder units is configured to operate at the same rate.
摘要:
A coding method comprises receiving, by at least one subblock interleaver (102), information subblocks A, B, and parity sequence subblocks Y 1 , Y 2 , W 2 , W 1 ; and outputting interleaved information subblocks A, B, a bit-by-bit multiplexed sequence of interleaved Y 1 and Y 2 subblock sequences comprising a first output bit from a Y 1 subblock interleaver, a first output bit from a Y 2 subblock interleaver, a second output bit from the Y 1 subblock interleaver, and a second output bit from the Y 2 subblock interleaver in order, and a bit-by-bit multiplexed sequence of interleaved W 2 and W 1 subblock sequences comprising a first output bit from a W 2 subblock interleaver, a first output bit from a W 1 subblock interleaver, a second output bit from the W 2 subblock interleaver, and a second output bit from the W 1 subblock interleaver in order.