Orthogonal Frequency Division Multiplexing (OFDM), a group of sub-tones mostly interferes with the same group of sub-tones in a neighbor cell even if the systems are not time-synchronized. Thus in OFDM or Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, interference can now be predicted and avoided with fine granularity on the basis of frequency [1]. In contrast to a reuse 1 system in which all cells use all frequency resources without any restrictions, inter-cell interference coordination (ICIC) makes use of the frequency dimension.
Multisensor array processing of noisy measurements has received considerable attention in many areas of signal processing. The optimal processing techniques developed so far usually assume that the signal and noise processes are at least wide sense stationary, yet a need exists for efficient, effective methods for processing nonstationary signals. Although wavelets have proven to be useful tools in dealing with certain nonstationary signals, the way in which wavelets are to be used in the multisensor setting is still an open question. Based on the structure for optimal linear estimation of nonstationary multisensor data and statistical models of spatial signal coherence, we propose a multisensor denoising algorithm that fully exploits, in a statistically optimal fashion, the additional information afforded by multisensor measurements. Under certain conditions, we show that the proposed estimator can be realized efficiently and robustly in a completely blind fashion, employing only wavelet and discrete Fourier transforms while entailing only a small loss in performance.
by modulating each of these sub-carriers. Further, time is divided into slots consisting of a number of OFDM symbols, and users are scheduled to transmit on an assigned set of sub-carriers in specific time slots. Scheduling can be either persistent, semi-persistent, or non-persistent.LTE is generally specified as a universal frequency reuse (or reuse 1) system to attain high performance through efficient use of frequency resources. While there is no intra-cell interference in LTE since users within a given cell are orthogonal due to the orthogonality of the sub-carriers, and the enhanced node B (eNB) scheduler ensures that a physical resource is allocated to only one user at any given time, there is interference because of transmissions on the same physical resources in a neighboring cell. This inter-cell interference has a major impact, especially on users at the edge of the cell, as
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