Channel Estimation for MIMO OFDM beamforming Systems
نویسندگان
چکیده
Transmit beamforming with receive combining is a simple method for exploiting the significant diversity provided by multiple-input multiple-output (MIMO) systems, and the use of orthogonal frequency division multiplexing (OFDM) enables low complexity implementation of this scheme over frequency selective MIMO channels. A major challenge to MIMO-OFDM systems is how to obtain the channel state information accurately and promptly for coherent detection of information symbols and channel synchronization. This paper describes channel estimation and tracking scheme for MIMO-OFDM systems based on pilot tones.
منابع مشابه
On Spherical Linear Interpolation for MIMO-OFDM Beamforming Systems
We analyze linear channel estimation for MIMO-OFDM systems and propose a spherical linear interpolator in closed-form for the beamforming codewords. We also suggest a hybrid interpolator using a simplified version of the derived interpolator. Simulation results show that the proposed schemes are efficient and competitive with respect to the feedback overhead and have low complexity. key words: ...
متن کاملChannel Estimation for Millimeter Wave MIMO-OFDM Systems via Low-Rank Tensor Decomposition
In millimeter-wave (mmWave) MIMO systems, both the base stations (BS) and the mobile stations (MSs) employ large antenna arrays for directional beamforming. Acquiring channel knowledge for beamforming transmission is challenging due to the large number of antennas. Several prior work has studied the overhead reduction channel estimation method on narrow-band channel. However, the mmWave systems...
متن کاملCarrier Frequency Offset Estimation For MIMO-OFDM Beamforming Systems
In wireless communications systems, Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) are used to improve spectral efficiency and spatial diversity. Beamforming is used to improve bandwidth utilization. It increases the network range in wireless systems. The main challenge of OFDM system is Carrier frequency offset (CFO). The project focuses on CFO esti...
متن کاملLinear Precoding using Transmitter Site Channel Estimation for MIMO-OFDM systems
Orthogonal Frequency Division Multiplexing is an approach that can be used to combat the effect of frequency selective fading channels. Apart from spectral efficiency, reliability over fast fading channels is a primary concern in OFDM. MIMO systems offer a solution to this problem owing to the high capacity and beamforming gain. The integration of MIMO with the traditional OFDM systems allow pa...
متن کاملThroughput Analysis of Adaptive BIC-MIMO-OFDM Systems
The noncoherent capacity of multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) systems is first derived. Then, an adaptive bit-interleaved coded modulation (BICM) scheme for the MIMO-OFDM system that exploits transmitter beamforming and variable-rate-variablepower (VRVP) QAM is proposed to enhance the throughput in a time-varying environment. The throughput of the v...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008