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Spatial Multiplexing in Cellular MIMO-CDMA Systems With Linear Receivers: Outage Probability and Capacity
White Paper In this paper, the effectiveness of spatial multiplexing in the forward link of cellular CDMA systems with linear (i.e.low complexity) receivers is investigated. Multiple transmit and receive antennas, and the diverse matrix channel they create... [10 Apr 2008]
Qualcomm snaps up Airgo
News Qualcomm has acquired a key player in the next era of wireless connectivity, Mimo pioneer Airgo. Mimo - multiple input, multiple output - is central to upcoming technologies such as mobile WiMax and the 802.11n wi-fi standard, as well as the long... [05 Dec 2006]
Samsung flashes its 4G
News It has also boasted hitting 1Gbps download in 2004, using SF-Spread OFDM and Mimo (multiple input multiple output) technologies. NTT DoCoMo, Japan's largest mobile operator, is planning to launch a commercial 4G network in 2010 and has already... [31 Aug 2006]
Space Frequency Codes From Spherical Codes
White Paper A new design method for high rate, fully diverse ('Spherical') space frequency codes for MIMO-OFDM systems is proposed, which works for arbitrary numbers of antennas and subcarriers. The former are well studied e.g.in the context of optimal... [16 Jun 2006]
Practical Low Complexity Linear Equalization for MIMO-CDMA Systems
White Paper This paper reviews recently proposed techniques for adaptive and direct linear MIMO equalization in the context of MIMO-CDMA systems and in particular with application to a MIMO-extended UMTS-FDD downlink. [07 Feb 2006]
On Spatial Multiplexing in Cellular MIMO-CDMA Systems With Linear Receivers
White Paper Through the development of new closed-form results on outage probability and capacity for MIMO-CDMA, the paper shows that cellular MIMO outage capacity is severely degraded by the enhancement of other-cell interference by the linear spatial... [13 Oct 2005]
Low-Complexity Performance Optimization for MIMO CDMA Systems
White Paper A low-complexity approach is proposed for optimizing the performance of a multiple input multiple-output (MIMO) direct sequence code division multiple-access (DS-CDMA) system in the uplink for frequency selective fading channels. [11 Oct 2005]
Efficient MIMO Equalization for Downlink Multi-Code CDMA: Complexity Optimization and Comparative Study
White Paper This paper presents an efficient LMMSE chip equalizer to suppress the interference caused by the multipath fading channel in the MIMO Multi-Code CDMA downlink. The block-Toeplitz structure in the correlation matrix is approximated with a block... [11 Oct 2005]
MIMO in 3G Cellular Systems: Challenges and Future Directions
White Paper The multidimensional MIMO channel can be exploited to increase the diversity of the system or to provide parallel spatial channels, which is known as spatial multiplexing. Diversity is generally considered lower risk, and a well-known example is... [11 Oct 2005]
An Efficient Circulant MIMO Equalizer for CDMA Downlink: Algorithm and VLSI Architecture
White Paper This paper presents an efficient circulant approximation based MIMO equalizer architecture for the CDMA downlink. MIMO (Multiple Input Multiple Output) technology using multiple antennas at both the transmitter and receiver has emerged as one of... [06 Oct 2005]
Hermitian Optimization and Scalable VLSI Architecture for Circulant Approximated MIMO Equalizer in CDMA Downlink
White Paper This paper proposes a parallel and pipelined VLSI architecture for a circulant approximated equalizer for the MIMO-CDMA systems. Multiple Input Multiple Output (MIMO) technology using multiple antennas at both the transmitter and receiver has... [06 Oct 2005]
Prototyping a MIMO W-CDMA System Using a System-Level Approach
White Paper This paper describes the development and prototyping of a MIMO (Multiple-Input Multiple Output) wireless link designed to operate under the WCDMA third generation cellular standard. Likewise, the second part reviews the basic concepts of space-time... [06 Oct 2005]
Chip-Level LMMSE Equalization for Downlink MIMO CDMA in Fast Fading Environments
White Paper This paper proposes an up-link Orthogonal Frequency and Code Division Multiplexing (OFCDM) mobile cellular system that uses channel pre-equalization at the Mobile Terminal (MT) and adaptive detection at the Base Station (BS). [06 Oct 2005]
FFT-Accelerated Iterative MIMO Chip Equalizer Architecture for CDMA Downlink
White Paper This paper presents a novel FFT-accelerated iterative Linear MMSE chip equalizer in the MIMO CDMA downlink receiver. The reversed form time-domain matrix multiplication in the Conjugate Gradient iteration is accelerated by an equivalent frequency... [06 Oct 2005]
Untimed-C Based SoC Architecture Design Space Exploration for 3G and Beyond Wireless Systems
White Paper MIMO (Multiple Input Multiple Output) technology using multiple antennas at both the transmitter and receiver sides is leading to MIMO-CDMA, MIMO-OFDM etc.as enabling techniques in future 3G and beyond wireless systems. [06 Oct 2005]
