System And Method For Transmitting A Low Density Parity Check Signal
AssigneeQualcomm Atheros, Inc.
InventorsKai Shi, Ning Zhang
Life of this patent
Estimating the term…
Abstract
A system and method for transmitting LDPC parameters is provided. In the method, an initial number of OFDM symbols (Nsym_init) is determined for a packet that is based on the number of information bits to be delivered in the packet. An STBC value is also determined. A number of extra symbols (Nsym_ext) value is generated based on the Nsym_init value, wherein a Nsym value is based on said Nsym_init value and said Nsym_ext value. An Nldpc_ext value is determined based on the STBC value and the Nsym_ext value for purposes of determining LDPC parameters associated with the packet.
Claims21
A method for LDPC encoding, comprising:
- at a transmitting device, based on the number of information bits to be delivered in a packet, determining an initial number of OFDM symbols;
- determining an STBC value;
- and
- determining a number of extra symbols value based on said initial number of OFDM symbols, wherein a final number of OFDM symbols is based on said initial number of OFDM symbols and said number of extra symbols value;
- and
- generating an LDPC extension value based on said STBC value and said number of extra symbols value for purposes of determining LDPC parameters associated with said packet.
A device handling a packet of information, wherein said packet comprises:
- an Nsym value;
- an STBC value;
- an Nldpc_ext value based on said STBC value and a number of extra symbols (Nsym_ext) value determined for said packet based on an initial number of OFDM symbols (Nsym_init), wherein said Nldpc_ext value is for purposes of determining LDPC parameters associated with said packet.
A device for interpreting a packet of information, wherein said packet comprises:
- an Nsym value;
- and
- an STBC value;
- wherein an Nldpc_ext value based on said STBC value and a number of extra symbols (Nsym_ext) value is assumed to be 1 for said packet, wherein said Nldpc_ext value is for purposes of determining LDPC parameters associated with said packet.
A system for LDPC encoding, comprising:
- at a transmitting device, an LDPC encoder for determining an initial number of OFDM symbols (Nsym_init) based on the number of information bits to be delivered in a packet;
- wherein said LDPC encoder determines a number of extra symbols (Nsym_ext) value based on said Nsym_init, wherein an Nsym value is based on said Nsym_init value and said Nsym_ext value;
- and
- at said transmitting device, an extension calculator for generating an Nldpc_ext value based on said STBC value and said Nsym_ext value for purposes of determining LDPC parameters associated with said packet.
A system for LDPC encoding, comprising:
- at a receiving device configured to receive a packet including a number of OFDM symbols (Nsym) value and an extension value (Nldpc_ext), a parser for parsing said Nldpc_ext value from a header of said packet, and for parsing said Nsym value from a signal field of said packet;
- and
- an LDPC decoder for determining an Nsym_ext value based on an STBC value contained within said packet and said Nldpc_ext value, and for determining said Nsym_init value based on said Nsym_ext value and said Nsym value.
Dependencies are inferred from the claim text.