TITLE:
Hard Decision-Based PWM for MIMO-OFDM Radar
AUTHORS:
Omar Daoud
KEYWORDS:
Multiple Input Multiple Output, Orthogonal Frequency Division Multiplexing, RADAR, Peak to Average Power Ratio, Pulse Width Modulation
JOURNAL NAME:
Communications and Network,
Vol.7 No.1,
February
9,
2015
ABSTRACT: For the purpose of target localization,
Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing
(MIMO-OFDM) radar has been proposed. OFDM technique has been adopted in order
to a simultaneous transmission and reception of a set of multiple narrowband
orthogonal signals at orthogonal frequencies. Although multi-carrier systems
such as OFDM support high data rate applications, they do not only require
linear amplification but also they complicate the power amplifiers design and
increase power consumption. This is because of high peak-to-average power ratio
(PAPR). In this work, a new proposition has been made based on the Pulse Width
Modulation (PWM) to enhance the MIMO-OFDM radar systems’ performance. In order
to check the proposed systems performance and its validity, a numerical
analysis and a MATLAB simulation have been conducted. Nevertheless of the
system characteristics and under same bandwidth occupancy and system’s
specifications, the simulation results show that this work can reduce the PAPR
values clearly and show capable results over the ones in the literature.