single antenna system in fading channels

... and Weibull fading models We also consider the combined effect of lognormal shadow fading and small-scale fading models 1) Rayleigh fading: Assume that the received signal amplitude in V2V channel ... increases When LOS component is intermittently lost at large distances, the channel fading becomes more severe than Rayleigh In [26], the following V2V settings were considered: urban, with antennas ... given threshold ψ In the remaining part of this section, we find the statistics of the transmission range for various fading models For Rayleigh fading, these results were reported in [4] We extend...

Ngày tải lên: 21/06/2014, 17:20

... benchmark in a slow flat fading channel using MRC Proposed system- 4 antenna Proposed system- 2 antennas Proposed system- 1 antennas Benchmark system- 4 antenna Benchmark system- 2 antennas Benchmark system- 1 ... Proposed system- 2 antennas Proposed system- 1 antennas Proposed system- 4 antenna Benchmark system- 4 antenna Proposed system- 2 antenna Benchmark system- 4 antenna Benchmark system- 2 antennas Benchmark system- 1 ... benchmark in a slow 20-path fading channel using SC 0 10 15 SNR (dB) Proposed system- 4 antenna Benchmark system- 4 antenna Proposed system- 2 antenna Benchmark system- 2 antenna Proposed system- 1 antenna...

Ngày tải lên: 21/06/2014, 22:20

... peak(s) in ECF domain using (15) Step 2(b): Look for Diff peak(s) in Diff domain using (16) (for PT(Diff 2) method) or for TK peak(s) in TK domain using (23) (for PT(TK) method) Step 2(c): Find competitive ... encountered in indoor positioning applications or in outdoor urban environments, and is the main focus of our paper The main algorithms used for GPS and Galileo code tracking, providing a certain sufficiently ... The nonlinear quadratic TK technique was first introduced for measuring the real physical energy of a system [43] Since its introduction, it has widely been used in various speech processing and...

Ngày tải lên: 22/06/2014, 19:20

... Performance of Antenna Arrays with Reverse-Link Synchronous Transmission Technique for DS-CDMA System in Multipath Fading Channels, vol 2402 of Lecture Notes in Computer Science, Springer, Heidelberg, ... noise variances of MAI and SI in a one-dimension antenna system In the case of the reverse-link asynchronous DS-CDMA system, we can obtain the variance of the total interference-plus-noise calculated ... −1, and (dB) and indicate that the CS AA system with RLSTT increasingly outperforms the corresponding system without RLSTT when the parameter of Kr increases Note that comparing Figure 2a and...

Ngày tải lên: 23/06/2014, 00:20

... reduce interchannel interference over a reverse link [7] In the RLSTT, the synchronous transmission in the reverse link can be achieved by adaptively controlling the transmission time in each ... simultaneous users in the system The third term is the selfinterference (SI) for the reference user Finally, the last term is AWGN PERFORMANCE OF AA WITH RLSTT IN RAYLEIGH FADING CHANNEL WITH PCE In our ... 1965 A Combined Antenna Arrays and Reverse-Link Synchronous DS-CDMA System Yong-Seok Kim was born August, 1970, in Seoul, Korea He received the B.S degree in electronic engineering from the...

Ngày tải lên: 23/06/2014, 01:20

... estimator using multiple-bit quantization in fading channels is still unavailable Although the MLE proposed in AWGN channels [9] can be applied for fading channels if the channel state information ... justifies the conclusions in [19–21], which show that AF is not optimal in fading channels According to the performance analysis for BPSK modulation in Rayleigh fading channels [32], the BER of ... multipleaccess fading channels in wireless sensor networks— optimal and suboptimal estimators Xin Wang∗1 and Chenyang Yang1 School of Electronics and Information Engineering, Beihang University, Beijing...

Ngày tải lên: 18/06/2014, 22:20

... estimator using multiple-bit quantization in fading channels is still unavailable Although the MLE proposed in AWGN channels [9] can be applied for fading channels if the channel state information ... justifies the conclusions in [19–21], which show that AF is not optimal in fading channels According to the performance analysis for BPSK modulation in Rayleigh fading channels [32], the BER of ... multipleaccess fading channels in wireless sensor networks— optimal and suboptimal estimators Xin Wang∗1 and Chenyang Yang1 School of Electronics and Information Engineering, Beihang University, Beijing...

Ngày tải lên: 20/06/2014, 04:20

... Chu sequence in both the time and frequency domains, the proposed SISO MC-CDMA uplink system has a low-PAPR property Finally, to prevent any interblock interference, a CP is inserted into each transmitted ... MC-CDMA system The environment considered is the uplink of a simplified single cell system over multipath channels For all simulations, a quasi-static multipath fading channel is assumed during each ... multiuser uplink and combat the MAI interference, different users are assigned to different sets of interleaved subcarriers, thus maintaining perfect orthogonality between multiple users 2.1 Single...

Ngày tải lên: 20/06/2014, 22:20

... macro-diversity system operating over Gamma shadowed -μ fading channel has been reported in the literature This article delivers infinite-series expressions for level crossing rate (LCR) and average fading ... micro-diversity system is of MRC type with an arbitrary number of branches in the presence of -μ fading The optimal combining technique is MRC [4] This combining technique involves co-phasing of the ... Loyka, Hybrid macro- and generalized selection combining microdiversity in lognormal shadowed rayleigh fading channels in Proceedings of the IEEE International Conference on Communications 1, 244–248...

Ngày tải lên: 20/06/2014, 22:20

... Chen, A blind synchronizer for OFDM systems based on SINR maximization in multipath fading channels IEEE Trans Veh Technol 58(2), 625–635 (2009) 19 WL Chin, SG Chen, A low-complexity minimum-interference ... a strictly ˆ increasing/decreasing function in I1/I3 Besides, due to the SINR plateau, tolerance is allowed if the final estimate of ˆ symbol timing θo lies in the ISI-free region In this condiˆ ... assists in locating θo in the middle position of ISI-free region, thus increasing the estimation accuracy Hence, the proposed method utilizes the plateau in the ISI-free region Following the introduction...

Ngày tải lên: 21/06/2014, 00:20

... performance increases with an increase in L From these results in is clear that the BER performance increases with an increase in L The HNN MLSE equalizer thus exploits sparsity in communication channels ... any single carrier M-QAM system is independent of the number of symbols in the modulation alphabet, allowing for equalization in 256-QAM systems with equal computational cost as for 4-QAM systems, ... expressions for the unknowns in (9) are found by expanding (4), for a fixed data block length N and increasing CIR length L and mapping it to (9) Therefore, for a singlecarrier system with a data block...

Ngày tải lên: 21/06/2014, 16:20

... correspondingly the channel gains, receive powers as the average transmission power constraint increases Particularly, λ∗ → as T → ∞ • Assuming independent fading channels, i.e., setting β = in (3), ... ones working on scheduling between close users, for instance scheduling in single- cell networks, e.g., [25–28] System model In this part, we consider a network with a single transmitter and two ... assumption that the fading channels are mutually independent That is, the network performance is investigated in the case where there is no correlation between the fading channels of different...

Ngày tải lên: 21/06/2014, 17:20

... model of the combined synchronization errors in time-selective and frequency-selective fading channels by extending the works in [1–15] Next, based on this model, the theoretical SINR is formulated ... doubly-selective fading channels is introduced in Section The signal model with synchronization errors is analyzed, and its theoretical SINR is formulated in Section Some compact results are given in Section ... simulation results are provided in Section Finally, we conclude our work in Section 2.1 SYSTEM AND CHANNEL MODELS System model In the following discussion, all the quantities indexed with l belong to...

Ngày tải lên: 21/06/2014, 22:20

... Receive FF information Receive FB information Determine FB information using CSI and FF information Transmit data using rate and power determined from buffer state and FB information Transmit FB information ... applicable in any point-to-point communication system In this paper, we consider only a frequency division duplex (FDD) system (in time division duplex (TDD) systems, the channel information ... Advances in Signal Processing some simple cases It turns out that having just one additional bit of FF information can provide about dB saving in power (iii) The performance gain of using FF information...

Ngày tải lên: 21/06/2014, 22:20

... as noise For single- input single- output Rayleigh fading channels, it turns out that the guaranteed MSE point is the tuple (1, 1, , 1) Thus in order to achieve nontrivial MSE points, for example, ... “Beamformo ing utilizing channel norm feedback in multiuser MIMO systems,” in Proceedings of the 8th IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC ’07), pp 1–5, Helsinki, ... OSTBC without linear processing of information symbols [14] Note that the rate reduction derived in [14] has been conjectured in [13] to hold for OSTBC with linear processing of information symbols...

Ngày tải lên: 21/06/2014, 22:20

... MMSE, 31 interf β = 0.5, 63 interf β = 0.5, 31 interf Subopt MMSE, 63 interf MMSE, 63 interf β 0.4 0.6 0.8 0.8 SUI-2, 31 interf SUI-2, 63 interf R3P-A, 31 interf R3P-A, 63 interf Uncor., 31 interf ... MMSE, 63 interf Subopt MMSE, 63 interf β = 0.5, 31 interf β = 0.5, 63 interf Subopt MMSE, 31 interf R3P-A, 31 interf R3P-A, 63 interf SUI-1, 31 interf β 0.2 0.4 0.6 SUI-1, 63 interf SUI-2, 31 interf ... Rayleigh fading, time and frequency correlated Rayleigh fading, and SUI channels) , system loads and combining techniques on the performance at physical and TCP level, allowing us to draw the following...

Ngày tải lên: 22/06/2014, 06:20

... resulting cost due to receiving packets into the buffer is also higher (i.e., less profitable) Figure 11 shows the allocation of link scheduling to the incoming links or the outgoing link, depending ... while maintaining its own service In general, this requires introducing a performance measure capturing the service objectives of all users in a balanced manner and will be investigated in future ... that by increasing the number M, the packet SYSTEM STATE TRANSITION IN A CYCLE Once a link is activated, the system state may be described using a finite state transition model involving only...

Ngày tải lên: 22/06/2014, 19:20

... destination node Interfering node Desired link source node Desired link destination node Interfering node (a) (b) Desired link source node Desired link destination node Interfering node Desired link source ... depicted in Figure Solid lines correspond to the desired link and dashed lines represent three interfering links as an example Pekka Pirinen a a Desired link source node Desired link destination ... desired cell incorporating the link of interest and intracell interference links Surrounding eight cells are divided into subgroups #1 (light grey) and #2 (dark grey), both including 50 50 50...

Ngày tải lên: 22/06/2014, 22:20

... ENVELOPES IN A REAL-TIME SCENARIO In Section 4.4, we have proposed the algorithm for generating N correlated Rayleigh fading envelopes in multipath, flat fading channels in a single time instant ... 3.2 Fading correlation as functions of spatial separation in antenna arrays The fading correlation properties between wireless channels as functions of antenna spacing in multiple antenna systems ... Rayleigh fading generator for generating an individual baseband Rayleigh fading envelope proposed in [10, 16] is shown in Figure This model generates a Rayleigh fading envelope using inverse discrete...

Ngày tải lên: 23/06/2014, 00:20