BLIND CHANNEL IDENTIFICATION AND SOURCE SEPARATION IN SPACE DIVISION MULTIPLE ACCESS SYSTEMS

To find an outer bound on the capacity region, coop-eration among the geographically separated mobile stationsis assumed to take place via a virtual central processor, andthere is a total power constraint. The total capacity is foundfor all combinations of n, n − 1, , 2, 1 mobile stations inthe syste[r]

Hindawi Publishing CorporationEURASIP Journal on Applied Signal ProcessingVolume 2006, Article ID 81729, Pages 1–15DOI 10.1155/ASP/2006/81729Iterative Pilot-Layer Aided Channel Estimation with Emphasison Interleave-Division Multiple Access SystemsHendrik Schoeneich and[r]

RIKU JANTTI, “ _WIDEBAND CODE DIVISION MULTIPLE ACCESS SYSTEMS 2 CR_ ” [21] “ _WCDMA NETWORK PLANNING_ ” [22] SYED SALMANUL HAQ HASHMI, “ _APPLICATION OF MOBILE CONTROLLIED MEDIA ON _ _U[r]

2130IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 9, NO. 7, JULY 2010User Selection Methods for Multiuser Two-Way Relay CommunicationsUsing Space Division Multiple AccessJingon Joung, Member, IEEE, and Ali H. Sayed, Fellow, IEEEAbstract—In this paper, we desig[r]

sources than microphones, source separation can beapproximately performed using time-frequency mask-ing method of [8].(vi) Perform an inverse STFT using the associated frequen-cies for each of the sources.Since the mixing matrix can be determined only up to ascaling factor, we assume a[r]

+ Tg. This makes the OFDM symbol insensitive to time dispersion. There are many advantages to using OFDM in a mobile access system, namely: 1- Long symbol time and guard interval increases robustness to multipath and limits intersymbol interference. 2- Eliminates the need[r]

≤ L,where tijis the number of calls between i and j.Acallmaybeblocked by the input- and/or output-port capacity limit L.The input-output connections are assigned on demandby the control unit (CU). That is, the CU receives an input-output call request via a demand or control channel<[r]

Hindawi Publishing CorporationEURASIP Journal on Advances in Signal ProcessingVolume 2007, Article ID 16381, 9 pagesdoi:10.1155/2007/16381Research ArticleExploiting Narrowband Efficiency for BroadbandConvolutive Blind Source SeparationRobert Aichner, Herbert Buchner, and W[r]

1IntroductionIndependent component analysis (ICA) is a method for finding underlying factors orcomponents from multivariate (multidimensional) statistical data. What distinguishesICA from other methods is that it looks for components that are both statisticallyindependent,andnongaussian. Here we brie[r]

.Since N could be several thousand or more, the spectrum is spread over a widefrequency range. These output frequencies are the RF carrier frequencies coupled tothe upconverter. The system is called a fast frequency hopping spread spectrum(FFHSS) system if the hopping rate is higher than the data bi[r]

ponents to be quite small, maybe only 1 or 2, and to determine so that thecontain as much information on the data as possible. This leads to a family oftechniques called principal component analysis or factor analysis.In a classic paper, Spearman [409] considered data that consisted of[r]

fading [1–3]. However, it may suffer from other-cell inter-ference (OCI) in cellular environments that use the same fre-quency band for all cells [4]. As a consequence, the systemcapacity is mainly limited by the OCI rather than other noisein interference-limited environments.A number of resea[r]

d. Bluetooth Inc.8. ZigBee is used for what common deployments? (Choose all that apply.)a. Home automationb. Monitoringc. GPS locationd. Control systems09_1587202115_ch08.qxd 9/29/08 2:39 PM Page 132Chapter 8: Additional Wireless Technologies 1339. ZigBee operates in which frequency ba[r]

rate-splitting transmission strategy, where part of the message is exchanged on the conferencing channels and then transmittedcooperatively to the base stations, is capacity achieving for sufficiently large conferencing capacity. In case of intercell conferencing,this strategy performs c[r]

100Standard deviation of delay estimate error (chips)Probability of errorConventionalDecorrelatorSICPICMMSEDecision feedbackFIGURE 5.15: Effect of timing errors (delay estimate errors) on system performance in an AWGNchannel with perfect power control (Eb/No= 8dB, spreading gain = 31, K = 20)we not[r]

Hindawi Publishing CorporationEURASIP Journal on Audio, Speech, and Music ProcessingVolume 2007, Article ID 85438, 15 pagesdoi:10.1155/2007/85438Research ArticleUnderdetermined Blind Audio Source Separation UsingModal DecompositionAbdeldjalil A¨ıssa-El-Bey, Karim Abed-Mer[r]

In the literature, several pilot symbols design techni-ques for OFDM systems with null subcarriers have beenstudied [11,13-16]. In [ 11], a method that assigns equalpower to al l pilot subcarriers and utilizes the exhaustivesearch method to obtain the optimal pilot set is[r]

transmission power while satisfying a minimum rate con-straint for each user. The problem was formulated as an in-teger programming problem and a continuous-relaxation-based suboptimal solution method was studied. In [ 2], a classof computationally inexpensive methods for power[r]

Figure 1: Flow of frequency-domain BSS (N = M = 2).or similar direction. In this paper, we propose a method forobtaining proper geometric information for solving the per-mutation problem in such cases.There is another problem with regard to the frequency-domain approach. Frequency-doma[r]

4Wireless protocolsA MAC protocol for a wireless LAN provides two types of data-transfer Service AccessPoints (SAP): network and native. The network SAP offers an access to a legacy networkprotocol (e.g., IP). The native SAP provides an extended service interface that may beused by cus[r]