phase ofdm
RSS phase ofdmMIMO OFDM Receivers for Systems With IQ Imbalances
White Paper However, the implementation of OFDM-based systems suffers from in-phase and quadrature-phase (IQ) imbalances in the front-end analog processing. Orthogonal frequency division... [10 Aug 2008]
Optimal Training Sequences for Channel Estimation in MIMO OFDM Systems in Mobile Wireless Channels
White Paper This paper describes a channel estimation and tracking scheme for MIMO OFDM systems based on pilot tones. It is shown in this paper that the minimum mean square error (MMSE) is obtained with equispaced pilot tones in... [03 Jul 2008]
Sliding Multiple Phase Differential Detection of Trellis-Coded MDPSK-OFDM
White Paper In this paper, the Viterbi decoder containing new branch metrics of the squared Euclidean distance with multiple order phase differences is introduced in order to improve the bit error rate (BER) in the differential... [03 Jul 2008]
Low Cost Residual Phase Tracking Algorithm for OFDM-Based WLAN Systems
White Paper This paper presents the design of an efficient low complexity orthogonal frequency division multiplexing receiver targeting wireless local area networks. The focus is on mitigation of the residual frequency synchronization error and... [03 Jul 2008]
Optimal Training Design for MIMO OFDM Systems in Mobile Wireless Channels
White Paper This paper describes a least squares (LS) channel estimation scheme for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems based on pilot tones. To reduce the training... [03 Jul 2008]
BER Performances of a Differential OFDM System in Fading Channels
White Paper In an OFDM system, various modulation methods can be used in order to encode the binary information. If a differential phase modulation scheme is chosen, data can be encoded in the relative... [11 Apr 2008]
On the Baseband Compensation of IQ Imbalances in OFDM Systems
White Paper Implementation of OFDM-based systems suffers from Inphase-Quadrature phase (IQ) imbalances in the front-end analog processing. OFDM is a widely recognized and standardized modulation... [10 Apr 2008]
Constant Envelope OFDM Phase Modulation: Spectral Containment, Signal Space Properties and Performance
White Paper A class of constant envelope OFDM phase modulated (OFDM-PM) signals is studied. The motivation behind OFDM-PM is to alleviate the high peak-to-average power ratio of... [10 Apr 2008]
Constant Envelope Binary OFDM Phase Modulation
White Paper This paper focuses on binary OFDM phase modulation, which is a special case of OFDM angle modulation. A class of signaling called OFDM angle modulation is presented.... [10 Apr 2008]
Analysis of the Influence of Phase Noise in MIMO OFDM Based WLAN Systems
White Paper The influence of phase noise (PN) on the performance of a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) based communication system is analyzed. For compensation... [10 Apr 2008]
Detection of OFDM-CPM Signals Over Multipath Channels
White Paper A class of Orthogonal Frequency Division Multiplexing - Continuous Phase Modulation (OFDM-CPM) signals is introduced in which binary data sequence is mapped to complex symbols using the concept of... [10 Apr 2008]
Error Probability Minimizing Pilots for OFDM With M-PSK Modulation Over Rayleigh-Fading Channels
White Paper This paper analyzes the symbol error rate (SER) performance of OFDM with M-ary Phase-Shift Keying (M-PSK) modulation over Rayleigh-fading channels, in the presence of channel estimation errors.... [10 Apr 2008]
Performance of Space-Combining Transmission Diversity With OFDM for Broadband Wireless Access Systems
White Paper One is optimal antenna selection in the reception phase and the other is signal transmission over each OFDM subchannel. This paper proposes a new diversity technique for broadband wireless access systems... [10 Apr 2008]
OFDM Receiver CORDIC Module
White Paper In OFDM receivers, orthogonality between sub-carriers can only be ensured when precise frequency translation between the txer and rxer is realized. Essentially, this indicates that OFDM receivers are... [10 Apr 2008]
OFDM or Single-Carrier Block Transmissions?
White Paper This paper compares two block transmission systems over frequency-selective fading channels: orthogonal frequency-division multiplexing (OFDM) versus single-carrier modulated blocks with zero padding (ZP). [10 Apr 2008]
