发明授权
US06847622B1 Methods and apparatus for providing multiple wireless communication services having different bit rates
有权
用于提供具有不同比特率的多个无线通信服务的方法和装置
- 专利标题: Methods and apparatus for providing multiple wireless communication services having different bit rates
- 专利标题(中): 用于提供具有不同比特率的多个无线通信服务的方法和装置
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申请号: US09713457申请日: 2000-11-15
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公开(公告)号: US06847622B1公开(公告)日: 2005-01-25
- 发明人: Thomas Peter Emmons, Jr. , James Startup , Robert Anthony Peters
- 申请人: Thomas Peter Emmons, Jr. , James Startup , Robert Anthony Peters
- 申请人地址: US IL Schaumburg
- 专利权人: Motorola, Inc.
- 当前专利权人: Motorola, Inc.
- 当前专利权人地址: US IL Schaumburg
- 代理商 Frank J. Bogacz
- 主分类号: H04B7/26
- IPC分类号: H04B7/26 ; H04B7/216
摘要:
A communication system provides multiple wireless services, each potentially having a different information bit rate. A transmitter (400, FIG. 4) encodes (504, FIG. 5) relatively low rate data (430, FIG. 4) using code division multiple access (CDMA). The resulting spread data stream(s) (436, FIG. 4) are multiplexed and modulated (506, 508, FIG. 5) along with relatively high information rate, non-encoded data streams (440, FIG. 4) using a time division multiple access/frequency division multiple access (TDMA/FDMA) protocol. In other embodiments, the methods and apparatus of the present invention can be used in a CDMA only system, or in a system using a time division multiplexing/FDMA and time division multiplexing/CDMA. In one embodiment, the spread data streams are transmitted in timeslots (211-214, FIG. 2) and frequencies (201-204, FIG. 2) that are interspersed between timeslots and frequencies used for the high rate data. A receiver (600, FIG. 6) performs complementary demodulation (704, FIG. 7), demultiplexing (706, FIG. 7), and decoding (710, FIG. 7).