US2008151854A1PendingUtilityA1

Method, system, and apparatus for transmitting interleaved data between stations

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Assignee: SOMA NETWORKS INCPriority: Jul 27, 2001Filed: Jan 18, 2008Published: Jun 26, 2008
Est. expiryJul 27, 2021(expired)· nominal 20-yr term from priority
Inventors:Ramesh ManthaJeffrey P. CasturaFrank Van Heeswyk
H04L 1/0071H04B 2201/70706H04L 1/0083
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PatentIndex Score
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Claims

Abstract

System and method for transmitting data over a communications link in at least two channels. At least one transmitter transmits data in the two channels simultaneously. At least one interleaver interleaves data to be transmitted in the two channels prior to transmission by the at least one transmitter. The at least one interleaver employs different sets of interleaving parameters when interleaving data to be transmitted in different channels, such that data to be transmitted in each channel is interleaved in a different pattern than data to be transmitted in the other channel(s). At least one receiver receives the data transmitted in at least one of the two channels. A de-interleaver, associated with the at least one receiver, employs the set of interleaving parameters corresponding to the at least one channel received by the at least one receiver to de-interleave data received by the at least one receiver.

Claims

exact text as granted — not AI-modified
1 . A system for transmitting data over a communications link in at least two channels, comprising:
 at least one transmitter operable to transmit data in the at least two channels simultaneously;   at least one interleaver operable to interleave the data to be transmitted in the at least two channels prior to transmission by the at least one transmitter, the at least one interleaver employing different sets of interleaving parameters when interleaving data to be transmitted in different channels such that data to be transmitted in each channel is interleaved in a different pattern than data to be transmitted in each of the other channels;   at least one receiver operable to receive the data transmitted in at least one of the at least two channels; and   a de-interleaver associated with the at least one receiver, the de-interleaver employing the set of interleaving parameters corresponding to the at least one channel received by the at least one receiver to de-interleave data received by the at least one receiver.   
     
     
         2 . The system as claimed in  claim 1  wherein the at least one transmitter informs the at least one receiver of the set of interleaving parameters corresponding to the at least one channel received by the at least one receiver. 
     
     
         3 . The system as claimed in  claim 1  wherein the at least one receiver determines the set of interleaving parameters corresponding to the at least one channel received by it. 
     
     
         4 . The system as claimed in  claim 1  wherein the data is transmitted in sets of code symbols. 
     
     
         5 . The system as claimed in  claim 4  wherein the sets of transmitted code symbols include symbols transmitted at zero energy and the sets of interleaving parameters are selected so as to minimize simultaneous transmission of interleaved code symbols transmitted at zero energy. 
     
     
         6 . The system as claimed in  claim 4  wherein the sets of interleaved code symbols are transmitted in frames having a defined transmission duration. 
     
     
         7 . The system as claimed in  claim 6  wherein the frames comprise a fixed number of time slots, each slot having the same number of code symbols. 
     
     
         8 . The system as claimed in  claim 1  wherein the at least one transmitter is a base station and the at least one receiver is a subscriber station. 
     
     
         9 . The system as claimed in  claim 1  wherein the interleaver is a square interleaver. 
     
     
         10 . The system as claimed in  claim 1  wherein CDMA is employed as a multiple access technique. 
     
     
         11 . The system as claimed in  claim 1  wherein the at least one transmitter is a radio transmitter and the at least one receiver is a radio receiver. 
     
     
         12 . The system as claimed in  claim 1  wherein:
 the at least one transmitter comprises at least two transmitters, each operable to transmit data simultaneously in a different one of the at least two channels, and   the at least one interleaver comprises an interleaver associated with each of the at least two transmitters, each interleaver operable to interleave the data to be transmitted by its associated transmitter prior to transmission, each interleaver employing different sets of interleaving parameters when interleaving data to be transmitted in different channels such that data to be transmitted in each channel is interleaved in a different pattern than data to be transmitted in each of the other channels.   
     
     
         13 . The system as claimed in  claim 12  wherein each set of interleaving parameters is provided to each interleaver from the at least one receiver. 
     
     
         14 . The system as claimed in  claim 12  wherein the set of interleaving parameters is selected by each interleaver in a manner known to the at least one receiver and the at least one receiver employs the known manner to determine the set of interleaving parameters to de-interleave the set of code symbols. 
     
     
         15 . The system as claimed in  claim 12  wherein each transmitter informs the at least one receiver of the set of interleaving parameters it has employed to interleave its transmissions. 
     
     
         16 . The system as claimed in  claim 12  wherein each transmitter is a subscriber station and the at least one receiver is a base station. 
     
     
         17 . The system as claimed in  claim 12  wherein the interleaver is a square interleaver. 
     
     
         18 . The system as claimed in  claim 12  wherein the code symbols are transmitted in frames having a selected transmission duration. 
     
     
         19 . The system as claimed in  claim 18  wherein the frames comprise a fixed number of time slots, each slot having the same number of code symbols. 
     
     
         20 . The system as claimed in  claim 12  wherein CDMA is employed as a multiple access technique. 
     
     
         21 . The system as claimed in  claim 12  wherein the sets of transmitted code symbols include symbols transmitted at zero energy and the sets of interleaving parameters are selected so as to minimize simultaneous transmission of interleaved code symbols transmitted at zero energy. 
     
     
         22 . The system as claimed in  claim 12  wherein the at least two transmitters are radio transmitters and the at least one receiver is a radio receiver 
     
     
         23 . A method for transmitting data in at least two channels simultaneously over a communications link in which data transmitted in each channel is represented by code symbols, the method comprising interleaving code symbols transmitted in each channel using a different interleaving pattern from that used for the other channels so as to minimize simultaneous transmission of identical symbols in different channels. 
     
     
         24 . The method as claimed in  claim 23  wherein code symbols are transmitted in frames, all frames having a same selected transmission duration, and frames transmitted in all channels are transmitted synchronously. 
     
     
         25 . The method as claimed in  claim 24  wherein each frame comprises a fixed number of time slots, each slot having the same number of code symbols. 
     
     
         26 . The method as claimed in  claim 23  wherein the communications link is a wireless link. 
     
     
         27 . The method as claimed in  claim 26  wherein CDMA is employed as a multiple access technique. 
     
     
         28 . The method as claimed in  claim 23  wherein transmitted code symbols include symbols that have zero energy level.

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