×

Communications system handoff operation combining turbo coding and soft handoff techniques

  • US 6,094,427 A
  • Filed: 08/20/1999
  • Issued: 07/25/2000
  • Est. Priority Date: 07/07/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A mobile communication system, comprising:

  • a source of digital data, for communication to or from a predetermined one of a plurality of mobile stations;

    a first constituent encoder, coupled to the source, for encoding the digital data into a first code sequence;

    an interleaver, coupled to the source, for interleaving the digital data;

    a second constituent encoder, coupled to the interleaver, for encoding the interleaved digital data into a second code sequence;

    a first code puncturer, coupled to the first and second constituent encoders, for selectively combining data from the first code sequence and data from the second code sequence according to a first puncturing pattern, to form a first punctured code sequence;

    a second code puncturer, coupled to the first and second constituent encoders, for selectively combining data from the second code sequence and data from the first code sequence according to a second puncturing pattern, to form a second punctured code sequence;

    first and second transmitters for transmission of information on first and second logical channels assigned to the predetermined mobile station; and

    wherein at least during a handoff operation, the first transmitter broadcasts the first channel carrying a first representation of the digital data together with the first punctured code sequence, and concurrently the second transmitter broadcasts the second channel carrying a second representation of the digital data together with the second punctured code sequence.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×