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    • 7. 发明申请
    • MULTI-ACCESS HYBRID OFDM-CDMA SYSTEM
    • 多访问混合OFDM-CDMA系统
    • US20100246642A1
    • 2010-09-30
    • US12813461
    • 2010-06-10
    • Jay R. WaltonJohn W. KetchumSteven J. HowardMark Wallace
    • Jay R. WaltonJohn W. KetchumSteven J. HowardMark Wallace
    • H04B1/707
    • H04W52/12H04B1/692H04L5/0021H04L5/0048H04L5/026H04L25/0228H04L27/0008H04L27/2607H04L27/2613H04L27/2647H04L27/2655H04W52/286
    • In one aspect of a multiple-access OFDM-CDMA system, the data spreading is performed in the frequency domain by spreading each data stream with a respective spreading code selected from a set of available spreading codes. To support multiple access, system resources may be allocated and de-allocated to users (e.g., spreading codes may be assigned to users as needed, and transmit power may be allocated to users). Variable rate data for each user may be supported via a combination of spreading adjustment and transmit power scaling. Interference control techniques are also provided to improve system performance via power control of the downlink and/or uplink transmissions to achieve the desired level of performance while minimizing interference. A pilot may be transmitted by each transmitter unit to assist the receiver units perform acquisition, timing synchronization, carrier recovery, handoff, channel estimation, coherent data demodulation, and so on.
    • 在多址OFDM-CDMA系统的一个方面,通过用从一组可用的扩展码中选择的相应的扩展码扩展每个数据流,在频域中执行数据扩展。 为了支持多次访问,可以向用户分配和分配系统资源(例如,可以根据需要将扩展​​码分配给用户,并且发送功率可以被分配给用户)。 可以通过扩展调整和发射功率缩放的组合来支持每个用户的可变速率数据。 还提供干扰控制技术以通过下行链路和/或上行链路传输的功率控制来提高系统性能,以实现期望的性能水平同时最小化干扰。 每个发射机单元可以发送导频,以帮助接收机单元执行采集,定时同步,载波恢复,切换,信道估计,相干数据解调等。
    • 8. 发明授权
    • Multiple-access hybrid OFDM-CDMA system
    • 多址混合OFDM-CDMA系统
    • US07764594B2
    • 2010-07-27
    • US11494126
    • 2006-07-26
    • Jay R. WaltonJohn W. KetchumSteven J. HowardMark Wallace
    • Jay R. WaltonJohn W. KetchumSteven J. HowardMark Wallace
    • H04J11/00H04B7/216
    • H04W52/12H04B1/692H04L5/0021H04L5/0048H04L5/026H04L25/0228H04L27/0008H04L27/2607H04L27/2613H04L27/2647H04L27/2655H04W52/286
    • In one aspect of a multiple-access OFDM-CDMA system, the data spreading is performed in the frequency domain by spreading each data stream with a respective spreading code selected from a set of available spreading codes. To support multiple access, system resources may be allocated and de-allocated to users (e.g., spreading codes may be assigned to users as needed, and transmit power may be allocated to users). Variable rate data for each user may be supported via a combination of spreading adjustment and transmit power scaling. Interference control techniques are also provided to improve system performance via power control of the downlink and/or uplink transmissions to achieve the desired level of performance while minimizing interference. A pilot may be transmitted by each transmitter unit to assist the receiver units perform acquisition, timing synchronization, carrier recovery, handoff, channel estimation, coherent data demodulation, and so on.
    • 在多址OFDM-CDMA系统的一个方面,通过用从一组可用的扩展码中选择的相应的扩展码扩展每个数据流,在频域中执行数据扩展。 为了支持多次访问,可以向用户分配和分配系统资源(例如,可以根据需要将扩展​​码分配给用户,并且发送功率可以被分配给用户)。 可以通过扩展调整和发射功率缩放的组合来支持每个用户的可变速率数据。 还提供干扰控制技术以通过下行链路和/或上行链路传输的功率控制来提高系统性能,以实现期望的性能水平同时最小化干扰。 每个发射机单元可以发送导频,以帮助接收机单元执行采集,定时同步,载波恢复,切换,信道估计,相干数据解调等。
    • 10. 发明申请
    • MULTIPLE-ACCESS HYBRID OFDM-CDMA SYSTEM
    • 多通道混合OFDM-CDMA系统
    • US20110317671A1
    • 2011-12-29
    • US13227946
    • 2011-09-08
    • Jay R. WaltonJohn W. KetchumSteven J. HowardMark Wallace
    • Jay R. WaltonJohn W. KetchumSteven J. HowardMark Wallace
    • H04W92/00H04J3/00H04B1/707
    • H04W52/12H04B1/692H04L5/0021H04L5/0048H04L5/026H04L25/0228H04L27/0008H04L27/2607H04L27/2613H04L27/2647H04L27/2655H04W52/286
    • In one aspect of a multiple-access OFDM-CDMA system, data spreading is performed in the frequency domain by spreading each data stream with a respective spreading code selected from a set of available spreading codes. To support multiple access, system resources may be allocated and de-allocated to users (e.g., spreading codes may be assigned to users as needed, and transmit power may be allocated to users). Variable rate data for each user may be supported via a combination of spreading adjustment and transmit power scaling. Interference control techniques are also provided to improve system performance via power control of the downlink and/or uplink transmissions to achieve the desired level of performance while minimizing interference. A pilot may be transmitted by each transmitter unit to assist the receiver units perform acquisition, timing synchronization, carrier recovery, handoff, channel estimation, coherent data demodulation, and so on.
    • 在多址OFDM-CDMA系统的一个方面,通过用从一组可用的扩展码中选择的相应的扩展码扩展每个数据流,在频域中执行数据扩展。 为了支持多次访问,可以向用户分配和分配系统资源(例如,可以根据需要将扩展​​码分配给用户,并且发送功率可以被分配给用户)。 可以通过扩展调整和发射功率缩放的组合来支持每个用户的可变速率数据。 还提供干扰控制技术以通过下行链路和/或上行链路传输的功率控制来提高系统性能,以实现期望的性能水平同时最小化干扰。 每个发射机单元可以发送导频,以帮助接收机单元执行采集,定时同步,载波恢复,切换,信道估计,相干数据解调等。