Minimum mean square error (MMSE) receiver employing 16-QAM in CDMA channel with narrowband Gaussian interference

Shamain, P.; Milstein, L.B.

doi:10.1109/milcom.1999.821318

Cited by 7 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Timing simulation of the applied system is performed to check the proper operation by Jeong, et al [49]. Shamain and Milstein [50] provided employ the highest constellation arrangement in conjunction with the CDMA system to develop performance in a multi-user multi-channel and proved to be a severe performance development gained using interference suppression technique above in the case of multi-user continues to hold in a multi-user environment with a narrowband Gaussian intrusion. After that, Jain and Buehrer [51] presented the implementation issues associated with the modulation of adaptive by pilot symbol assisted modulation founded channel estimators for Rayleigh fading environments.…”

Section: B the Development Of Designs For Wireless Communication Sysmentioning

confidence: 99%

FPGA Implementation of MC-CDMA Wireless Communication System Based on SDR-A Review

Nahar¹,

Gitaffa²,

Ali³

et al. 2017

Review of Information Engineering and Applications

View full text Add to dashboard Cite

Software Defined Radio (SDR) has the flexibility to modify the characteristics of the receiving and transmitting radio device, without physically adjusting the hardware, due to development in the system. Because of the increasing need for wireless communication applications so as to enable consumers to communicate anywhere through information led to the emergence of many communication devices to include the large amount of applications that every one of the devices needs power and thereby increase the total power. This study confirms that the wireless communication system for secured transmit data, fast and inexpensive; can be done by implementing using Partial Reconfiguration (PR) modern technology in FPGA developing based on SDR. The Speed and performance can be improved. The area also can be decreased. The new Xilinx, Vertex Series FPGA, provides the provision of PR. The power consumption can be reduced by applying power reduction techniques in the blocks. The combination of MATLAB (Simulink and M-file) and Simulink HDL Coder offers flexible capabilities for analysis, design; simulation, implementation, and verification. With all these capabilities, in a single system to reduce the time spent tuning for reducing the algorithms and models during rapid prototyping and experimentation and less time on HDL coding. Contribution/ Originality: This study contributes in the existing literature review for implementing MC-CDMA wireless communication system using Partial Reconfiguration (PR) that is a new technology in FPGA. 1. INTRODUCTION The wireless communications revolution started with the mobile phone at the beginning of the 80's and all the improvements which have led to the multiplication of mobile and wireless communications networks and standards [1]. The 1st Generation (1G) of technology was characterized by analog means voice only; 1G quality was too low and also had connections to low speed, but they effectively offered the inherent easiness of mobile communications. The system used in 1G was Frequency Division Multiple Access (FDMA) [2]. The 2nd Generation (2G) of technology is digital in the United States, most of the devices and services were digital. The spread of digital mobile

show abstract

Section: B the Development Of Designs For Wireless Communication Sysmentioning

confidence: 99%

FPGA Implementation of MC-CDMA Wireless Communication System Based on SDR-A Review

Nahar¹,

Gitaffa²,

Ali³

et al. 2017

Review of Information Engineering and Applications

View full text Add to dashboard Cite

show abstract

“…Then, the output of the th despreading branch for the th desired code can be written by (9) where is the desired signal component, which is from the th path of the th code (10) The desired signal component is related to the channel fading gain and phase. Thus, the inputs of the M-QAM demapper should be scaled by the estimated for symbol decision according to the constellation map.…”

Section: Receiver Modelmentioning

confidence: 99%

“…The concept of high-order modulation for CDMA systems was first proposed by Milstein et al [9], [10] to support higher data rate and multimedia transmission for wireless communications. Performance on a coherent Rake receiver for 16-QAM modulated single code CDMA in frequency-selective fading channel was evaluated by means of simulation in [11].…”

Section: Introductionmentioning

confidence: 99%

Analytical Study of QAM With Interference Cancellation for High-Speed Multicode CDMA

Xia¹,

Wang²

2005

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

In this paper, we consider the multilevel quadrature amplitude modulation (M-QAM) for forward link of multicode code-division multiple-access (CDMA) systems with interference cancellation to support high data rate service, and provide an analytical bit error rate (BER) performance of the system. In the current third-generation (3G) wide-band CDMA systems, in addition to multicode transmission, M-QAM is employed for high-speed downlink packet access (HSPDA) due to its high spectral efficiency. In frequency-selective fading channels, multipath interference seriously degrades the system performance, therefore interference cancellation technique is employed at the receiver. In this paper, an analytical closed-form BER of multicode CDMA systems with QAM is presented, where two important factors (channel estimation error and additive interference) on system performance are considered. Numerical results show that the system is very sensitive to additive multipath interference. With the help of interference cancellation technique, M-QAM can be adaptively employed in high signal-to-noise ratio cases to increase system throughput, within 5 MHz bandwidth. Meanwhile, simulation results are shown to illustrate the accuracy of the analytical method. Moreover, it is found that extra pilot power should be invested for more accurate channel estimation and consequently better BER performance when using the interference cancellation technique.

show abstract

Untitled

Almutairi

2003

Wireless Personal Communications

View full text Add to dashboard Cite

Minimum mean square error (MMSE) receiver employing 16-QAM in CDMA channel with narrowband Gaussian interference

Cited by 7 publications

References 8 publications

FPGA Implementation of MC-CDMA Wireless Communication System Based on SDR-A Review

FPGA Implementation of MC-CDMA Wireless Communication System Based on SDR-A Review

Analytical Study of QAM With Interference Cancellation for High-Speed Multicode CDMA

Untitled

Contact Info

Product

Resources

About