Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system

A method of transmitting data in a wireless multi-carrier communication system, comprising:

• allocating slots to each of a plurality of data symbol streams and pilot symbols, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• multiplexing data symbols in each data symbol stream onto the slots allocated to the data symbol stream and pilot symbols onto the slots allocated to the pilot symbols;
• forming a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams and pilot symbols, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• and
• forming 2N interlaces with a plurality of frequency subbands usable for transmission the composite symbol stream, where N>1 and each interlace comprises a different set of uniformly distributed frequency subbands selected from among the plurality of frequency subbands so that each of the plurality of subbands belongs to only one interlace and consecutive subbands in each set are spaced apart by 2N subbands;
• and
• mapping the plurality of slots in each symbol period to the 2N interlaces for transmitting the composite symbol stream so that interlaces used for pilot transmission have varying distances to interlaces used for data transmission.

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to allocate slots to each of a plurality of data symbol streams and pilot symbols, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• and
• a data processor operative to multiplex data symbols in each data symbol stream and pilot symbols onto the slots allocated to the data symbol stream and pilot symbols to form a composite symbol stream, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• wherein the controller is further operative to form a plurality M interlaces with U frequency subbands usable for transmission of the composite symbol stream, where U >1 and each interlace comprises a different set of uniformly distributed frequency subbands selected from among the U frequency subbands so that each of the U frequency subbands belongs to only one interlace and consecutive subbands in each set are spaced apart by M subbands;
• and
• wherein the plurality of slots in each symbol period are identified by slot indices, and wherein the data processor is further operative to, for each symbol period, map the slot indices to the plurality M of interlaces based on a mapping scheme so that interlaces used for pilot transmission have varying distances to interlaces used for data transmission.

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to allocate slots to each of a plurality of data symbol streams, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• a data processor operative to multiplex data symbols in each data symbol stream onto the slots allocated to the data symbol stream and to form a composite symbol stream, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• wherein the controller is further operative to select slots for pilot transmission from among the plurality of slots in each symbol period, and wherein the data processor is further operative to multiplex pilot symbols onto the slots used for pilot transmission;
• and
• wherein the controller is further operative to form a plurality M interlaces comprising different sets of uniformly distributed frequency subbands U usable for transmission of the pilot symbols and the data symbol streams in the allocated slots, where each of the frequency subbands U belongs to only one interlace and consecutive subbands in each set are spaced apart by M subbands.

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to allocate slots to each of a plurality of data symbol streams, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• a data processor operative to multiplex data symbols in each data symbol stream onto the slots allocated to the data symbol stream and to form a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• wherein the controller is further operative to allocate a particular number slots to each data symbol stream based on at least one packet size and at least one coding and modulation scheme used for the data symbol stream;
• and
• wherein the controller is further operative to form a plurality M interlaces comprising different sets of uniformly distributed frequency subbands U usable for transmission of each of a plurality of data symbol streams in the allocated slots , where each of the frequency subbands U belongs to only one interlace and consecutive subbands in each set are spaced apart by M subbands.

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to allocate slots to each of a plurality of data symbol streams, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• a data processor operative to multiplex data symbols in each data symbol stream onto the slots allocated to the data symbol stream and to form a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• wherein the data processor is further operative to process a plurality of data streams to obtain the plurality of data symbol streams, one data symbol stream for each data stream;
• and
• wherein the controller is further operative to form a plurality M interlaces comprising different sets of uniformly distributed frequency subbands U usable for transmission of each of a plurality of data symbol streams in the allocated slots where each of the frequency subbands U belongs to only one interlace and consecutive subbands in each set are spaced apart by M subbands.

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to allocate slots to each of a plurality of data symbol streams, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• a data processor operative to multiplex data symbols in each data symbol stream onto the slots allocated to the data symbol stream and to form a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• wherein the controller is further operative to form a plurality M interlaces comprising different sets of uniformly distributed frequency subbands U usable for transmission of each of a plurality of data symbol streams in the allocated slots, where each of the frequency subbands U belongs to only one interlace and consecutive subbands in each set are spaced apart by M subbands;
• and
• wherein the wireless multi-carrier communication system utilizes orthogonal frequency division multiplexing (OFDM).

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to allocate slots to each of a plurality of data symbol streams, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• a data processor operative to multiplex data symbols in each data symbol stream onto the slots allocated to the data symbol stream and to form a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• wherein the controller is further operative to form a plurality M interlaces comprising different sets of uniformly distributed frequency subbands U usable for transmission of each of a plurality of data symbol streams in the allocated slots, where each of the frequency subbands U belongs to only one interlace and consecutive subbands in each set are spaced apart by M subbands;
• and
• wherein the wireless multi-carrier communication system is a broadcast system.

An apparatus in a wireless multi-carrier communication system, comprising:

• means for allocating slots to each of a plurality of data symbol streams and pilot symbols, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• means for multiplexing data symbols in each data symbol stream and pilot symbols onto the slots allocated to the data symbol stream and slots allocated to the pilot symbols;
• means for forming a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams and pilot symbols, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• means for forming a plurality M interlaces with U frequency subbands usable for transmission of the composite symbol stream, where U >1 and each interlace comprises a different set of uniformly distributed frequency subbands selected from among the U frequency subbands so that each of the U subbands belongs to only one interlace and consecutive subbands in the set are spaced apart by M subbands;
• and
• means for mapping the plurality of slots in each symbol period to the plurality of interlaces for transmitting of the composite symbol stream so that interlaces used for pilot transmission have varying distances to interlaces used for data transmission.

A method of receiving data in a wireless multi-carrier communication system, comprising:

• selecting at least one data stream for recovery from among a plurality of data streams transmitted by a transmitter in the system using a plurality M interlaces with U frequency subbands, where U >1 and each interlace comprises a different set of uniformly distributed frequency subbands selected by the transmitter from among the U frequency subbands so that each of the U subbands belongs to only one interlace and consecutive subbands in the set are spaced apart by M subbands;
• determining slots used for each selected data stream, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period, wherein data symbols for each of the plurality of data streams are multiplexed onto slots allocated to the data stream, and wherein the plurality of data streams are independently recoverable by a receiver;
• multiplexing detected data symbols obtained for slots used for each selected data stream onto a detected data symbol stream, wherein each detected data symbol is an estimate of a data symbol and at least one detected data symbol stream is obtained for the at least one data stream selected for recovery;
• and
• processing each detected data symbol stream to obtain a corresponding decoded data stream.

An apparatus in a wireless multi-carrier communication system, comprising:

• a controller operative to select at least one data stream for recovery from among a plurality of data streams transmitted by a transmitter in the system and to determine slots used for each selected data stream, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period, wherein data symbols for each of the plurality of data streams are multiplexed onto slots allocated to the data stream, and wherein the plurality of data streams are independently recoverable by a receiver;
• a data processor operative to multiplex detected data symbols obtained for slots used for each selected data stream onto a detected data symbol stream and to process each detected data symbol stream to obtain a corresponding decoded data stream, wherein each detected data symbol is an estimate of a data symbol and at least one detected data symbol stream is obtained for the at least one data stream selected for recovery;
• and
• wherein the controller is further operable to map the plurality of slots in each symbol period to a plurality M interlaces formed with U frequency subbands used for transmission of data streams by the transmitter, where U >1 and each interlace comprises a different set of uniformly distributed frequency subbands selected from among the U frequency subbands so that each of the U subbands belongs to only one interlace and consecutive subbands in the set are spaced apart by M subbands.

An apparatus in a wireless multi-carrier communication system, comprising:

• means for selecting at least one data stream for recovery from among a plurality of data streams transmitted by a transmitter in the system;
• means for determining slots used for each selected data stream, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period, wherein data symbols for each of the plurality of data streams are multiplexed onto slots allocated to the data stream, and wherein the plurality of data streams are independently recoverable by a receiver;
• means for multiplexing detected data symbols obtained for slots used for each selected data stream onto a detected data symbol stream, wherein each detected data symbol is an estimate of a data symbol and at least one detected data symbol stream is obtained for the at least one data stream selected for recovery;
• means for processing each detected data symbol stream to obtain a corresponding decoded data stream;
• and
• means for mapping the plurality of slots in each symbol period to a plurality M interlaces formed with U frequency subbands used for transmission of data streams by the transmitter, where U >1 and each interlace comprises a different set of uniformly distributed frequency subbands selected from among the U frequency subbands, so that each of the U subbands belongs to only one interlace and consecutive subbands in the set are spaced apart by M subbands.

A computer program product embedded in a non-transitory computer readable storage medium containing a set of instructions for a processor to perform a method of managing mobile device operation, the medium comprising instructions for:

• allocating slots to each of a plurality of data symbol streams, wherein each slot is a unit of transmission and a plurality of slots are frequency division multiplexed in each symbol period;
• multiplexing data symbols in each data symbol stream onto the slots allocated to the data symbol stream;
• forming a composite symbol stream with multiplexed data symbols for the plurality of data symbol streams, wherein the plurality of data symbol streams are independently recoverable by a receiver;
• forming a plurality of M interlaces with U frequency subbands usable for transmission of at least data symbols of the composite symbol stream, where U >1 and each interlace comprises a different set of uniformly distributed frequency subbands selected from among the U frequency subbands so that each of the U subbands belongs to only one interlace and consecutive subbands in the set are spaced apart by M subbands;
• and
• mapping the plurality of slots in each symbol period to the plurality of interlaces for transmitting at least data symbols of the composite symbol stream so that interlaces used for pilot transmission have varying distances to interlaces used for data transmission.