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    • 5. 发明申请
    • FFT-BASED ESTIMATION OF THERMAL NOISE AND RISE OVER THERMAL IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中基于FFT的热噪声和热噪声估计
    • US20090207746A1
    • 2009-08-20
    • US12242569
    • 2008-09-30
    • Lu YuanDanlu ZhangMehraban IraninejadSharad Sambhwani
    • Lu YuanDanlu ZhangMehraban IraninejadSharad Sambhwani
    • H04L12/26
    • H04B17/382H04B17/345
    • Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. Thermal noise in a sideband may be measured and used as an estimate of thermal noise in a signal band. In one design, samples containing a desired signal centered at DC or a frequency higher than DC may be partitioned into blocks of K samples. Each block of K samples may be transformed with an FFT to obtain a corresponding block of K transform coefficients for K frequency bins. The power of transform coefficients for frequency bins in the sideband may be computed. Thermal noise may be estimated based on power values for the frequency bins in the sideband. Power values for frequency bins in the signal band may also be obtained and used to estimate total received power. RoT may then be estimated based on the estimated thermal noise and the estimated total received power.
    • 描述了用于估计通信系统中的热噪声和上升热(RoT)的技术。 可以测量边带中的热噪声并将其用作信号频带中的热噪声的估计。 在一种设计中,包含以DC或高于DC的频率为中心的期望信号的样本可被划分为K个样本的块。 可以用FFT对K个采样的每个块进行变换,以获得用于K个频率仓的K个变换系数的相应块。 可以计算边带中频率仓的变换系数的幂。 可以基于边带中的频率仓的功率值来估计热噪声。 也可以获得信号频带中的频率仓的功率值并用于估计总接收功率。 然后可以基于估计的热噪声和估计的总接收功率来估计RoT。
    • 6. 发明授权
    • FFT-based estimation of thermal noise and rise over thermal in a wireless communication system
    • 在无线通信系统中基于FFT的热噪声估计和热噪声上升
    • US08264975B2
    • 2012-09-11
    • US12242569
    • 2008-09-30
    • Lu YuanDanlu ZhangMehraban IraninejadSharad Sambhwani
    • Lu YuanDanlu ZhangMehraban IraninejadSharad Sambhwani
    • H04L12/26H04J11/00
    • H04B17/382H04B17/345
    • Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. Thermal noise in a sideband may be measured and used as an estimate of thermal noise in a signal band. In one design, samples containing a desired signal centered at DC or a frequency higher than DC may be partitioned into blocks of K samples. Each block of K samples may be transformed with an FFT to obtain a corresponding block of K transform coefficients for K frequency bins. The power of transform coefficients for frequency bins in the sideband may be computed. Thermal noise may be estimated based on power values for the frequency bins in the sideband. Power values for frequency bins in the signal band may also be obtained and used to estimate total received power. RoT may then be estimated based on the estimated thermal noise and the estimated total received power.
    • 描述了用于估计通信系统中的热噪声和上升热(RoT)的技术。 可以测量边带中的热噪声并将其用作信号频带中的热噪声的估计。 在一种设计中,包含以DC或高于DC的频率为中心的期望信号的样本可被划分为K个样本的块。 可以用FFT对K个采样的每个块进行变换,以获得用于K个频率仓的K个变换系数的相应块。 可以计算边带中频率仓的变换系数的幂。 可以基于边带中的频率仓的功率值来估计热噪声。 也可以获得信号频带中的频率仓的功率值并用于估计总接收功率。 然后可以基于估计的热噪声和估计的总接收功率来估计RoT。