Description: A design method was introd uced to efficiently implement an interpolator by Farrow structure，which can be used in an
all—digital timing recovery scheme．An algorithm was presented to calculate the interpolator coefficients of Farrow structure and mini—
mize the mean square error(MSE)at the output 0f the receiver．Simulation results show that compared with other conventional inter—
polation filters，the performance with this optimized Farrow coefficients was improved in minimum MSE and the implementation
complexity was reduced Platform: |
Size: 58619 |
Author:xiaohumama |
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Description: These files in Matlab implement a conventional DS -CDMA detector using QPSK modulation and matched filters in the receiver.-These files in Matlab implement a conventional DS-CDMA detector using QPSK modulation and matched filters in the receiver. Platform: |
Size: 3072 |
Author:Saurabh |
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Description: In this paper we develop an optimal receiver for
an asynchronous IDMA system. A super-block structure is used
to formulate the band diagonal matrix model for asynchronous
IDMA. We show that the cost function for the ML decoder can
be viewed as a path metric through a structured trellis. We
use a dynamic programming algorithm to find the maximum
likelihood transmitted bit sequence. We compare the performance
of the optimal receiver with the conventional iterative receiver.
Our results show that the optimal asynchronous IDMA receiver
outperforms the iterative IDMA receiver for the IDMA systems
with small block sizes that we simulated. Platform: |
Size: 1170432 |
Author:raghaw |
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Description: 传统均衡器无法有效地同时对抗这两种信道衰落，而Turbo均衡技术作为一种联合信道均衡和信道译码的方法，能有效地对抗符号间干扰（ISI），提供迭代增益，提高接收机的整体性能。因此，本文根据下一代无线通信系统的设计要求，分别对单载波和OFDM系统的Turbo均衡算法进行了研究。
-Conventional equalizer can not effectively fight both at the same time fading, while the Turbo equalization as a joint channel equalization and channel decoding method is robust against inter-symbol interference (ISI), provides iteration gain, improved receiver overall performance. Therefore, this next-generation wireless communication system according to the design requirements, namely, the single carrier and OFDM systems Turbo equalization algorithm is studied. Platform: |
Size: 703488 |
Author:w |
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Description: An adaptive transmit diversity scheme with quadrant phase constraining feedback is proposed in this
paper. With simple linear operations at both transmitter and receiver, the proposed algorithm can achieve better
system performances with only 2M − 2 bits of feedback information for systems with M transmit antennas.
Theoretical performance bounds of the proposed transmit diversity scheme are derived. Simulation examples and
theoretical analyses show that the proposed transmit diversity scheme outperforms not only the conventional openloop
transmit diversity techniques, but also some closed-loop transmit diversity techniques with more information
transmitted in the feedback channel.-An adaptive transmit diversity scheme with quadrant phase constraining feedback is proposed in this
paper. With simple linear operations at both transmitter and receiver, the proposed algorithm can achieve better
system performances with only 2M − 2 bits of feedback information for systems with M transmit antennas.
Theoretical performance bounds of the proposed transmit diversity scheme are derived. Simulation examples and
theoretical analyses show that the proposed transmit diversity scheme outperforms not only the conventional openloop
transmit diversity techniques, but also some closed-loop transmit diversity techniques with more information
transmitted in the feedback channel. Platform: |
Size: 222208 |
Author:anna |
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Description: This paper considers frequency-domain receiver
design for OQPSK signals (Offset Quaternary Phase
Shift Keying). It is shown that conventional QPSK receivers
are not suitable to OQPSK schemes since they
lead to significant interference between in-phase (I) and
quadrature (Q) components. To overcome this problem
we propose several linear receivers where there is no
I-Q interference. Our receivers are suitable to OQPSK
schemes, significantly outperforming frequency-domain receivers
designed for QPSK modulations. Platform: |
Size: 113664 |
Author:吕立圣 |
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Description: 很好的GPS/INS超紧组合导航的文章，关键词：GPS,INS，超紧组合导航，抗干扰-The performance of an Ultra-Tightly Coupled
(UTC) Global Positioning System/Inertial Navigation System
(GPS/INS) is evaluated using a system simulation of the GPS
receiver and navigation processing. The UTC system being
analyzed uses a bank of pre-filters to estimate code delay error
and Doppler frequency error for each satellite. These outputs are
sent to a central Kalman navigation filter. This central processor
generates estimates of inertial navigation position, velocity, and
attitude errors IMU biases and user clock errors, which are
used to correct the navigation solution. In the UTC approach,
outputs from the central navigation processor, after projection
into satellite line-of-sight coordinates, are used to control the
code and carrier replica signals for each satellite channel. In
contrast, a conventional tightly coupled GPS/INS system uses
separate tracking loops for each satellite channel, which operate
autonomously. As a result, the UTC desig Platform: |
Size: 461824 |
Author:lili |
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Description: We first show that part of the IFFT in the transmitter in an OFDM system can be shifted to the receiver, while a conventional one-tap frequency-domain equalizer is still applicable. Platform: |
Size: 599040 |
Author:avv |
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Description: 数字宽带接收机的信道化处理下的常规雷达信号的信号检测与脉内调制模式识别-The digital wideband receiver channel of the conventional radar signal under the condition of signal detection and intra-pulse modulation pattern recognition Platform: |
Size: 245760 |
Author:张未坤 |
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Description: Here, wavelets are used in Orthogonal frequency division multiplexing. Wavelets are small waves having amplitude increase starting zero and reduces back to zero. In conventional OFDM, IFFT is used at the transmitter side and FFT is used at receiver. In case of Wavelet OFDM, IFFT is replaced with IDWT and DWT is used instead of FFT. In OFDM cyclic prefix is added to reduce inter channel interference and inter carrier interference. By using wavelet transform, cyclic prefix is not needed. Hence, it has high spectral efficiency. Wavelet transform the signal one domain to time and frequency domain. -Here, wavelets are used in Orthogonal frequency division multiplexing. Wavelets are small waves having amplitude increase starting zero and reduces back to zero. In conventional OFDM, IFFT is used at the transmitter side and FFT is used at receiver. In case of Wavelet OFDM, IFFT is replaced with IDWT and DWT is used instead of FFT. In OFDM cyclic prefix is added to reduce inter channel interference and inter carrier interference. By using wavelet transform, cyclic prefix is not needed. Hence, it has high spectral efficiency. Wavelet transform the signal one domain to time and frequency domain. Platform: |
Size: 1024 |
Author:Salini |
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Description: Over-the-horizon radar (OTHR) exploits skywave propagation
of high-frequency signals to detect and track targets,
which are different from the conventional radar. It
has received wide attention because of its wide area surveillance,
long detection range, strong anti-stealth ability,
the capability of the long early warning time, and so on.
In OTHR, a significant problem is the effect of multipath
propagation, which causes multiple detections via
different propagation paths for a target with missed detections
and false alarms at the receiver [1–6]. Nevertheless,
the conventional tracking algorithms, such as
probabilistic data association (PDA) [7–9], presume that
a single-measurement per target, it may consider the
other measurements of the same target as clutter, and
multiple tracks are produced when a single target is
present. Therefore, these methods cannot effectively
solve the multipath propagation problem.(Conventional multitarget tracking systems presume that each target can produce at most one measurement
per scan. Due to the multiple ionospheric propagation paths in over-the-horizon radar (OTHR), this assumption is
not valid. To solve this problem, this paper proposes a novel tracking algorithm based on the theory of finite set
statistics (FISST) called the multipath probability hypothesis density (MP-PHD) filter in cluttered environments.
First, the FISST is used to derive the update equation, and then Gaussian mixture (GM) is introduced to derive
the closed-form solution of the MP-PHD filter. Moreover, the extended Kalman filter (EKF) is presented to deal
with the nonlinear problem of the measurement model in OTHR. Eventually, the simulation results are provided
to demonstrate the effectiveness of the proposed filter.) Platform: |
Size: 18432 |
Author:ioeyoyo |
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Description: Abstract: The paper presents the design and implementation of LVDS (low-voltage differential signaling) receiver circuit, fully
compatible with LVDS standard. The proposed circuit is composed of the telescopic amplifier and the comparator with internal
hysteresis. The receiver supports 3.5 Gbps data rate with 7.4 mA current at 1.8 V supply according to post-layout circuit simulations.
The circuit has the power consumption of 13.1 MW. Comparing with the conventional circuit, the circuit is achieved to reduce the
power consumption by 19.1% and the data rate by 14.3%. The validity and effectiveness of the proposed circuit are verified through the
circuit simulation with Samsung 0.18 μm CMOS (complementary metal-oxide-semiconductor) standard technology under the 1.8 V
supply voltage. Platform: |
Size: 615465 |
Author:ggc_gcc |
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Search - conventional receiver