CDMA with partitioned spreading

C Schlegel - IEEE Communications Letters, 2007 - ieeexplore.ieee.org
… -controlled CDMA [13]. But even with power control, the spectral utilization of CDMA is quite
low, … In this paper we motivate an enhancement of CDMA which is based on partitioning the …

Sparsely spread CDMA—A statistical mechanics-based analysis

J Raymond, D Saad - Journal of physics a: mathematical and …, 2007 - iopscience.iop.org
CDMA research is on developing efficient codes and decoding methods. In this paper we
study a variant of the original method, sparse CDMA, where the spreadingpartition function as …

Randomly spread CDMA: Asymptotics via statistical physics

D Guo, S Verdú - IEEE Transactions on Information Theory, 2005 - ieeexplore.ieee.org
This paper studies randomly spread code-division multiple access (CDMA) and multiuser
detection in the large-system limit using the replica method developed in statistical physics. …

Iterative multiuser detection of random CDMA using partitioned spreading

C Schlegel, D Truhachev… - … Symposium on Turbo …, 2006 - ieeexplore.ieee.org
… and it is shown that partitioned spreading conditions the channels such that … partition
spreading) to a two stage decoding procedure and a full iterative decoding schedule of PS-CDMA

On the performance of partitioned-spreading CDMA with multistage demodulation

Z Shi, R Kempter, C Schlegel… - 2006 40th Annual …, 2006 - ieeexplore.ieee.org
… each other by the user-specific spreading sequences. The random access na… -spreading
CDMA (PS-CDMA) [1], [2] has been proposed. PS-CDMA partitions the original CDMA spread

Spread-signature CDMA: Efficient multiuser communication in the presence of fading

GW Wornell - IEEE Transactions on Information Theory, 1995 - ieeexplore.ieee.org
… -signature sets we use possess what we refer to as a good "partitioning" characteristics. In
particular, as we will see, good partitioning results in more uniform distribution of cochannel …

Two‐stage detection of partitioned random CDMA

L Krzymien, D Truhachev, C Schlegel… - European …, 2008 - Wiley Online Library
partitioned CDMA [16] … Partitioned spreading is a way to arrange CDMA signals for efficient
iterative detection. Prior to transmission each spreading waveform is divided into M partitions, …

Asynchronous CDMA systems with random spreading—Part II: Design criteria

L Cottatellucci, RR Muller… - IEEE Transactions on …, 2010 - ieeexplore.ieee.org
… in [11] and [12] for CDMA systems in AWGN channels and … for a CDMA system whose number
of users and spreading factor … of the users’ spreading sequences and depend only on few …

Multiuser antenna partitioning for cellular MIMO–CDMA systems

W Choi, JG Andrews, RW Heath - IEEE Transactions on …, 2007 - ieeexplore.ieee.org
… Although orthogonal codes are nominally optimal as spreading codes in the downlink [30],
we consider ci,k as random spreading codes in this paper. The use of random spreading

Distributed intercell coordination through time reuse partitioning in downlink CDMA

A Ghasemi, ES Sousa - 2004 IEEE Wireless Communications …, 2004 - ieeexplore.ieee.org
… a time reuse partitioning algorithm similar to the channel reuse partitioning in narrowband
… We consider the downlink direction of a CDMA system with M base stations and N users …