receiver orthogonal
MIMO OFDM Receivers for Systems With IQ Imbalances
White Paper Orthogonal frequency division multiplexing (OFDM) is a widely recognized modulation scheme for high data rate communications. The resulting IQ distortion limits the achievable operating SNR at the receiver and, consequently, the achievable data rates. [10 Aug 2008]
Anytime Coding on the Infinite Bandwidth AWGN Channel: A Sequential Semi-Orthogonal Code
White Paper It is well known that orthogonal coding can be used to approach the Shannon capacity of the power-constrained AWGN channel without a bandwidth constraint. This paper shows that it is possible to do this using a semi-orthogonal variation of pulse... [11 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 sampling... [03 Jul 2008]
Chip-Rate Adaptive Two-Stage Receiver for Scrambled Multirate CDMA Downlink
White Paper This paper proposes an adaptive two-stage receiver for a scrambled multirate DS-CDMA downlink transmitted via synchronous orthogonal short codes and subjected to time- and frequency-selective multipath fading. [03 Jul 2008]
A (Simplified) Bluetooth Maximum A Posteriori Probability (MAP) Receiver
White Paper The Laurent decomposition provides an orthogonal vector space for the MAP receiver. The HiperLAN/2 receiver requires the most computation power in comparison with Bluetooth. This paper discusses a simplified MAP receiver for Bluetooth GFSK signals. [03 Jul 2008]
Software Radio Implementation of Carrier Offset Estimation for OFDM Communications With Multipath
White Paper Orthogonal Frequency Division Multiplexing (OFDM) communications transforms frequency selective channels into multiple low rate subchannels robust against frequency selective fading. This paper describes the implementation and verification of a... [03 Jul 2008]
Approaching MIMO-OFDM Capacity With Per-Antenna Power and Rate Feedback
White Paper This paper presents power-efficient transmission schemes for the Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) block-fading channel under the assumption that the channel is known only perfectly at the... [03 Jul 2008]
Performance of MIMO Antenna Selection for Space-Time Coded OFDM Systems
White Paper This paper studies antenna selection for space-time coded orthogonal frequency division multiplexing (OFDM) systems that employ multiple transmit and receive antennas. It is assumed that the channel state information (CSI) is exactly known at the... [03 Jul 2008]
Antenna Selection for Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing Systems
White Paper This paper addresses the problem of transmit antenna selection for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems employing spatial multiplexing. To overcome this problem, a fewer number of RF chains... [03 Jul 2008]
Performance Comparison of OFDM Carrier Synchronization Algorithms With Diversity
White Paper This paper compares the performances of Non Linear Least Squares (NLS) method and Maximum Likelihood Estimation (MLE) method used for carrier frequency synchronization in Orthogonal Frequency Division Multiplexing (OFDM) communication systems. [03 Jul 2008]
Frequency Domain IQ Imbalance Correction Scheme for Orthogonal Frequency Division Multiplexing (OFDM) Systems
White Paper This paper describes the sources and the effect of the IQ imbalance as well as a new method for correcting the error due to the imbalance in Orthogonal Frequency Division Multiplexing (OFDM) systems. This means that conventionally negligible error... [03 Jul 2008]
Intercarrier Interference Self-Cancellation Scheme for OFDM Mobile Communication Systems
White Paper For orthogonal frequency-division multiplexing (OFDM) communication systems, the frequency offsets in mobile radio channels distort the orthogonality between subcarriers resulting in intercarrier interference (ICI). [03 Jul 2008]
Adaptive Loading in MIMO/OFDM Systems
White Paper Orthogonal Frequency Division Multiplexing (OFDM) is a powerful technique employed in communications systems suffering from frequency selectivity. Combined with multiple antennas at the transmitter and receiver as well as adaptive modulation, OFDM... [03 Jul 2008]
Blind Carrier Offset Estimation for MIMO OFDM Systems: Cramer Rao Bound and Nonlear Least Squares
White Paper Orthogonal Frequency Division Multiplexing (OFDM) communications transform frequency selective channels into multiple low rate subchannels robust against frequency selective fading. Carrier frequency offset between transmitter and receiver local... [03 Jul 2008]
Performance Analysis of Diversity Combining Method for OFDM Blind Carrier Synchronization
White Paper Orthogonal Frequency Division Multiplexing (OFDM) communications transform frequency selective channels into multiple low rate subchannels robust against frequency selective fading. Carrier Frequency Offset (CFO) between transmitter and receiver... [03 Jul 2008]
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