Diversity Analysis of Space-Time-Frequency Coded Broadband OFDM Systems
نویسندگان
چکیده
Multi-antenna communication systems with OFDM modulation have the potential to play an important role in the design of the next generation broadband wireless communication systems. In this paper, we propose a general framework for the performance analysis of space-timefrequency coded MIMO-OFDM systems. Our approach incorporates the space-time and space-frequency coding approaches as special cases. We also determine the maximum achievable diversity order of space-time-frequency codes, and a simple repetition coding approach is used to achieve full diversity. Moreover, we investigate the effect of temporal and frequency-domain correlation on the performance of MIMO-OFDM systems. The simulation results demonstrate that in some cases, considerable performance improvement can be achieved via space-time-frequency coding compared to the space-frequency coding approach.
منابع مشابه
Single-Carrier Frequency-Domain Equalization for Orthogonal STBC over Frequency-Selective MIMO-PLC channels
In this paper we propose a new space diversity scheme for broadband PLC systems using orthogonal space-time block coding (OSTBC) transmission combined with single-carrier frequency-domain equalization (SC-FDE). To apply this diversity technique to PLC channels, we first propose a new technique for combining SC-FDE with OSTBCs applicable to all dispersive multipath channels impaired by impulsive...
متن کاملChannel Compensation for SFBC-OFDM Systems in Broadband Wireless Channels
In this paper, we consider orthogonal space-frequency transmit diversity schemes for OFDM systems in broadband wireless channels. We propose a compensation method to prevent error floor caused by unequal subchannels in the space-frequency block coded OFDM systems for 2 and 3 transmit antennas while providing diversity gain. We will show that for 2 antennas case, the proposed compensation method...
متن کاملSelective Tone Reservation method for PAPR reduction in SFBC-OFDM systems
The high Peak to Average Power Ratio (PAPR) of Orthogonal Frequency Division Multiplexing (OFDM) and MIMO-OFDM systems reduces the system efficiency. In this paper, an extension of Tone Reservation (TR) method is introduced for PAPR reduction in Space Frequency Block Coded OFDM (SFBC-OFDM) systems. The proposed algorithm is based on a time domain kernel which is added to the signal of the anten...
متن کاملPerformance of Concatenated Optimized Irregular LDPC Code with Alamouti Coded MIMO-OFDM Systems
-Multiple input multiple output (MIMO) communication systems along with orthogonal frequency division multiplexing (OFDM) have a great potential for future 4G broadband wireless communications. Recently, low density parity check codes (LDPC) achieves good error correcting performance and capacity near Shannon’s limit. In this paper, we considered the performance analysis of serially concatenate...
متن کاملSpace-Frequency Transmit Diversity in Multiband-OFDM Systems
In this paper we investigate the suitability and performance of space-frequency block coded Multi-band orthogonal frequency division multiplexing (MB-OFDM) system under UWB channel model. The employment of transmit diversity techniques based on block codes is expected to achieve enhancement in such systems since it greatly reduces the detrimental effects of multipath fading. In the proposed MB-...
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 2003