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    • 2. 再颁专利
    • Single-carrier to multi-carrier wireless architecture
    • 单载波到多载波无线架构
    • USRE43670E1
    • 2012-09-18
    • US12319707
    • 2009-01-09
    • Mark A. WebsterMichael J. Seals
    • Mark A. WebsterMichael J. Seals
    • H04L27/28
    • H04L25/0226H04L27/0008H04L27/2613H04W72/00H04W84/00
    • A Baseband receiver including a CIR estimate block, gain, phase and timing loops, a CMF, a single-carrier processor and a multi-carrier processor. The CIR estimate block generates an impulse response signal based on a receive signal that is a single-carrier signal or a single-carrier segment of a mixed carrier signal. The single-carrier segment has a spectrum that approximates a multi-carrier spectrum. The gain, phase and timing loops adjust gain, phase, frequency and timing to provide an adjusted receive signal. The CMF filters the adjusted receive signal according to the impulse response signal. The single-carrier processor processes the adjusted and filtered receive signal to resolve a single-carrier segment of a mixed carrier signal. The single-carrier processor detects a mixed carrier mode indication in a single-carrier segment and asserts a start indication. The multi-carrier processor processes a multi-carrier segment of a mixed carrier signal in response to assertion of the start indication.
    • 包括CIR估计块,增益,相位和定时环路的基带接收机,CMF,单载波处理器和多载波处理器。 CIR估计块基于作为混合载波信号的单载波信号或单载波段的接收信号产生脉冲响应信号。 单载波段具有近似多载波频谱的频谱。 增益,相位和定时回路调整增益,相位,频率和时序,以提供调整的接收信号。 CMF根据脉冲响应信号对调整后的接收信号进行滤波。 单载波处理器处理经调整和滤波的接收信号以解析混合载波信号的单载波段。 单载波处理器检测单载波段中的混合载波模式指示,并断言起始指示。 响应于断言启动指示,多载波处理器处理混合载波信号的多载波段。
    • 5. 发明授权
    • Dual packet configuration for wireless communications
    • 用于无线通信的双包配置
    • US08194530B2
    • 2012-06-05
    • US11849579
    • 2007-09-04
    • Mark A. WebsterSteven D. HalfordRichard D. Roberts
    • Mark A. WebsterSteven D. HalfordRichard D. Roberts
    • H04J9/00
    • H04L27/2602H04L27/0008H04W84/12H04W88/06H04W92/02
    • A dual packet configuration for wireless communications including a first portion that is modulated according to a serial modulation and a second portion that is modulated according to a parallel modulation. The serial modulation may be DSSS whereas the parallel modulation may be OFDM. The first portion may include a header, which may further include an OFDM mode bit and a length field indicating the duration the second portion. The first portion may be in accordance with 802.11b to enable dual mode devices to coexist and communicate in the same area as standard 802.11b devices. The dual mode devices can communicate at different or higher data rates without interruption from the 802.11b devices. The packet configuration may include an OFDM signal symbol which further includes a data rate section and a data count section. In this manner, data rates the same as or similar to the 802.11a data rates may be specified between dual mode devices. The first and second portions may be based on the same or different clock fundamentals. For OFDM, the number of subcarriers, pilot tones and guard interval samples may be modified independently or in combination to achieve various embodiments. Also, data subcarriers may be discarded and replaced with pilot tones for transmission. The receiver regenerates the discarded data based on received data, such as using ECC techniques.
    • 一种用于无线通信的双包配置,包括根据串行调制被调制的第一部分和根据并行调制被调制的第二部分。 串行调制可以是DSSS,而并行调制可以是OFDM。 第一部分可以包括报头,报头还可以包括OFDM模式位和指示第二部分的持续时间的长度字段。 第一部分可以符合802.11b,以使得双模式设备能够在与标准802.11b设备相同的区域中共存和通信。 双模设备可以以不同或更高的数据速率进行通信,而不会中断802.11b设备。 分组配置可以包括还包括数据速率部分和数据计数部分的OFDM信号符号。 以这种方式,可以在双模式设备之间指定与802.11a数据速率相同或类似的数据速率。 第一和第二部分可以基于相同或不同的时钟基本原理。 对于OFDM,可以独立地或组合地修改子载波数,导频音和保护间隔样本的数量以实现各种实施例。 此外,可以丢弃数据副载波并用导频音来代替传输。 接收机基于接收的数据(例如使用ECC技术)重新生成丢弃的数据。