公开(公告)号：US20130177059A1

公开(公告)日：2013-07-11

申请号：US13784531

申请日：2013-03-04

Applicant: QUALCOMM Incorporated

Inventor： Ashok MANTRAVADI ,  Aamod Dinkar KHANDEKAR ,  Edward Harrison TEAGUE ,  Tamer A. KADOUS

IPC: H04L25/02

CPC classification number: H04L25/022 ,  H04L25/0218 ,  H04L25/0232

Abstract: For channel estimation in a spectrally shaped wireless communication system, an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation, where P is a power of two. A channel impulse response estimate is obtained by performing a P-point IFFT on the initial frequency response estimate. A final frequency response estimate for N total subbands is derived by (1) setting low quality taps for the channel impulse response estimate to zero, (2) zero-padding the channel impulse response estimate to length N, and (3) performing an N-point FFT on the zero-padded channel impulse response estimate. The channel frequency/impulse response estimate may be filtered to obtain a higher quality channel estimate.

Abstract translation: 对于频谱形状的无线通信系统中的信道估计，基于在用于导频传输的第二组子带上接收的导频符号，获得对于第一组P均匀间隔子带（1）的初始频率响应估计，以及（2）使用 外插和/或插值，其中P是2的幂。 通过对初始频率响应估计执行P点IFFT来获得信道脉冲响应估计。 通过（1）将信道脉冲响应估计的低质量抽头设置为零，（2）将信道脉冲响应估计零填充到长度N，得到N个总子带的最终频率响应估计，以及（3）执行N 点零点填充信道脉冲响应估计。 可以对信道频率/脉冲响应估计进行滤波以获得更高质量的信道估计。