Open AccessEstimation of transmit‐antenna number with different space–frequency transmission schemes for MIMO‐OFDM systems
Author(s) -
Li Tao,
Li Yongzhao,
Gao Mingjun,
Zhang Hailin
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.3630
Subject(s) - orthogonal frequency division multiplexing , transmission (telecommunications) , mimo , antenna (radio) , mathematics , algorithm , rank (graph theory) , mimo ofdm , computer science , electronic engineering , statistics , telecommunications , engineering , beamforming , combinatorics , estimator
A hypothesis testing based algorithm is proposed to estimate the transmit‐antenna number with different space–frequency transmission schemes for multiple‐input multiple‐output orthogonal frequency division multiplexing (MIMO‐OFDM) systems. The ranks of received sample covariance matrices composed by every two adjacent subcarriers can be estimated by utilising the statistical property of the largest noise eigenvalue. With a series of the estimated values of the ranks, the number of transmit antennas is determined by a decision mechanism, which is designed based on the frequencies of the rank values. Simulations demonstrate that the proposed algorithm performs well without the prior knowledge of the space–frequency transmission scheme.