High-Performance MIMO-OFDM via Carrier Interferometry

Barbosa, Patricia R.; Wu, Zhiqiang; Nassar, C.R.

doi:10.1109/glocom.2003.1258360

Cited by 14 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The combining strategy is employed to help restore orthogonality between symbol streams, minimizing interference and maximizing frequency diversity benefits. In the fading channel, Minimum Mean-Square Error Combining (MMSEC) can be used to minimize inter-symbol-interference from other spreading codes and noise [1,8].Finally, the received data samples are deinterleaved and are given to the decision device which uses hard decision Viterbi Algorithm (VA). (11) where l means the transmit antenna number and means expectation operation.…”

Section: ( ) T R Rmentioning

confidence: 99%

See 1 more Smart Citation

Performance Analysis of MIMO SFBC CI-COFDM System against the Nonlinear Distortion and Narrowband Interference

Reddy

Naidu

2012

IJESS

View full text Add to dashboard Cite

Carrier Interferometry Coded Orthogonal Frequency Division Multiplexing (CI-COFDM) system has been widely studied in multi-carrier communication system. The CI-COFDM system spreads each coded information symbol across all N sub-carriers using orthogonal CI spreading codes. The CI-COFDM system shows the advantages of Peak to Average Power Ratio (PAPR) reduction, frequency diversity and coding gain without any loss of communication throughput. On the other side, a great attention has been devoted to Multi Input Multi Output (MIMO) antenna systems and space-time-frequency processing. In this paper, we focus on two Transmit (Tx)/one Receive (Rx) antennas configuration and evaluate the performance of MIMO OFDM, MIMO CIOFDM and MIMO CI-COFDM systems. Space Frequency Block Coding (SFBC) is applied to MIMO OFDM, MIMO CI-ODFM and MIMO CI-COFDM systems. For CI-COFDM realization, digital implemented CI-COFDM is used in which information conventional is encoded, CI code spreading operation and carrier allocation are processed by IFFT type operation. From simulation results, it is shown that MIMO SFBC CI-COFDM reduces PAPR significantly as compared with that of MIMO SFBC CI-OFDM and MIMO SFBC OFDM systems. In Narrow Band Interference (NBI) channel MIMO SFBC CI-COFDM systems achieve considerable Bit Error Rate (BER) improvement compared with MMO SFBC CI-OFDM and MIMO SFBC OFDM system.

show abstract

Section: ( ) T R Rmentioning

confidence: 99%

“…In recent times, some studies in the area of CI-OFDM system with MIMO have been performed [8][9][10]. There, STBC method is applied in some algorithms, and, MIMO CI-COFDM system is utilized to compensate the BER penalty caused by Doppler frequency or frequency selective fading.…”

Section: Iintroductionmentioning

confidence: 99%

Performance Analysis of MIMO SFBC CI-COFDM System against the Nonlinear Distortion and Narrowband Interference

Reddy

Naidu

2012

IJESS

View full text Add to dashboard Cite

show abstract

“…The spreading code that can be applied with precode OFDM is carrier interferometry (CI). The CI precoding with OFDM is called CI/OFDM [2]. The CI/OFDM system delivers less BER and PAPR than the OFDM system [3], [4].…”

Section: Introductionmentioning

confidence: 99%

High performance WH-spread SC-I/OFDM system

Metkarunchit

2015

2015 Third International Conference on Digital Information, Networking, and Wireless Communications (DINWC)

View full text Add to dashboard Cite

This article objective is to introduce a novel WHspread SC-I/OFDM system, created from the data symbol spreading with Walsh-Hadamard code in the time domain and suppressed carrier-interferometry (SC-I) code in the frequency domain to improve BER performance of the OFDM system. In the simulation, the signal is transmitted over frequency selective fading channel and affected by carrier frequency offset. As a result, it is concluded that WH-spread SC-I/OFDM performance is higher than both OFDM system and CI/OFDM system and achieves robustness to carrier frequency offset. Keywordssuppressed carrier interferometry; orthogonal frequency division multiplex; carrier frequency offset

show abstract

“…Therefore, this paper will propose a channel estimation technique using a carrier interferometry (CI) [11]- [13] combined with CDM in the frequency domain to estimate CSI with smaller number of spreading factor even in MIMO introduced systems. In the CI technique, when the same value of the amplitude and phase are assigned to all the subcarriers in the OFDM signal, its time domain signal corresponds to an impulse having a sinc waveform.…”

Section: Introductionmentioning

confidence: 99%

A Carrier Interferometry Based Channel Estimation Technique for MIMO-OFDM/TDMA Systems

Yokomakura

Sampei

Harada³

et al. 2007

IEICE Transactions on Communications

View full text Add to dashboard Cite

This paper proposes a channel estimation technique for the dynamic parameter controlled-orthogonal frequency and time division multiple access (DPC-OF/TDMA) systems studied as one of the candidates of the beyond third generation (B3G) systems. In the proposed scheme, the impulse response, which represents the channel state information (CSI) is estimated using carrier interferometry (CI) which is equivalent to impulse signal transmission. Moreover, because the minimum number of subcarriers allocated to terminals is 64, in order to estimate a CSI with its spreading factor of 64, we employ a code-multiplexed CI signal for a cell search process and a time-domain-multiplexed CI signal for transmit antenna identification. Furthermore, we also propose a flexible CSI estimation scheme that supports two cases: multiple subchannel block assignment and MIMO transmission cases. Computer simulation confirms that the proposed scheme can estimate the CSI with high accuracy.

show abstract

High-Performance MIMO-OFDM via Carrier Interferometry

Cited by 14 publications

References 9 publications

Performance Analysis of MIMO SFBC CI-COFDM System against the Nonlinear Distortion and Narrowband Interference

Performance Analysis of MIMO SFBC CI-COFDM System against the Nonlinear Distortion and Narrowband Interference

High performance WH-spread SC-I/OFDM system

A Carrier Interferometry Based Channel Estimation Technique for MIMO-OFDM/TDMA Systems

Contact Info

Product

Resources

About