multiple systems orthogonal
Design of Networking Protocols for Shallow Water Peer-to-Peer Acoustic Networks
White Paper In such an environment, orthogonal modulation schemes could provide a solution for multiple simultaneous acoustic links. As an alternative to orthogonal schemes, random shared access technology has proven successful in many wireless networks. [09 Jan 2008]
Rapid MIMO-OFDM Software Defined Radio System Prototyping
White Paper Combining MIMO with Orthogonal Frequency Division Multiplexing (OFDM), it is possible to significantly reduce receiver complexity as OFDM greatly simplifies equalization at the receiver. Multiple Input-Multiple Output (MIMO) is an attractive... [31 Aug 2007]
Adaptation of Multiple Access Parameters in Time Hopping UWB Cluster Based Wireless Sensor Networks
White Paper First, an orthogonal time hopping sequence construction is proposed for synchronous communications (downlink), where the number of pulses per symbol is adjusted to meet the bit error rate requirement of an application. [23 Aug 2007]
Throughput Enhancement for Wireless Communication Systems Using the Multiple Antenna Technique MIMO
White Paper A promising way to achieve this is the combination of Multiple-Input Multiple-Output (MIMO) signal processing with Orthogonal Frequency Division Multiplexing (OFDM). One of the main goals in developing next generation wireless communication systems... [08 Aug 2007]
Multi-Code Multicarrier CDMA: Performance Analysis
White Paper By allowing each user to transmit multiple orthogonal codes, the proposed MC-MC-CDMA system can support various data rates, as required by next generation standards, and achieve spreading gain in both the time and frequency domains. [04 Jul 2007]
Performance Analysis and Design Optimization of LDPC-Coded MIMO OFDM Systems
White Paper This paper considers the performance analysis and design optimization of Low-Density Parity Check (LDPC) coded Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems for high data rate wireless transmission. [26 Apr 2007]
Per-Tone Equalization for MIMO-OFDM Systems
White Paper This paper focuses on Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems, where the MIMO channel order is larger than the length of the Cyclic Prefix (CP). [18 Apr 2007]
Simple Coarse Frequency Offset Estimation Schemes for OFDM Burst Transmission
White Paper Simple methods of the estimation of that part of the frequency offset, which is a multiple of the subcarrier spacing in the OFDM (Orthogonal Frequency Division Multiplexing) systems have been proposed. [18 Apr 2007]
Transmit Diversity Vs Beamforming for Multi-User OFDM Systems
White Paper In an Orthogonal Frequency Division Multiplexing (OFDM) system, downlink beamforming can be implemented either before IDFT (frequency domain) or after IDFT (time domain) module in a base station transmitter. [18 Apr 2007]
Multiuser Detection and Channel Estimation in MIMO OFDM Systems Via Blind Source Separation
White Paper This paper proposes a blind multiuser detection and channel estimation method for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems based on Blind Source Separation (BSS). [18 Apr 2007]
On the Influence of Phase Noise Induced ICI in MIMO OFDM Systems
White Paper The influence of transmitter and receiver Phase Noise (PN) on the performance of a Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) based communication system is analyzed. [18 Apr 2007]
Reduced Complexity Blind Layered Space-Time Equalization for MIMO OFDM Systems
White Paper This paper proposes reduced complexity blind Layered Space-Time Equalization (LSTE) for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM). Blind Source Separation (BSS) combined with a Vertical Bell... [18 Apr 2007]
Modified SMI Techniques for Frequency Selective Channels in OFDM
White Paper In this paper, windowing techniques are applied in order to calculate a beamformer per subcarrier for Orthogonal Frequency Division Multiplexing (OFDM) systems with very limited known training. However, in Time Division Multiple Access (TDMA... [14 Apr 2007]
Equalization and Multi-User Detection for OFDM-Based CDMA Schemes
White Paper In an Orthogonal Frequency Division Multiplexing (OFDM) based Code Division Multiple Access (CDMA) system, the spreading schemes will suffer loss of orthogonality between code-words of different users. [14 Apr 2007]
New Frame Synchronization Technique for OFDM/OFDMA and MC-CDMA Systems
White Paper In the context of Orthogonal Frequency Division Multiplexing (OFDM), most papers define OFDM symbol synchronization as frame synchronization. The main contribution of this work is to propose a novel, low complexity, frame synchronization method for... [14 Apr 2007]
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