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The next generation of radio technologies designed to increase the capacity and speed of mobile networks. LTE is the first technology designed explicitly for the Next Generation Network NGN and is set to become the de-facto NGN mobile access network standard. It takes advantage of the NGN's capabilities to provide an always-on mobile data experienc...
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... Testing under AWGN and Rayleigh channels. QPSK and 16 QAM tested under AWGN channel from Figure 9 the results show butter BER performance with QPSK under AWGN channel with gain 4 dB of E b /N o in 10 -8 BER while under Rayleigh channel the gain in E b /N o is 3 dB at 10 -3 BER with QPSK modulation. Similarity test LTE uplink with QPSK and 16 QAM waveforms examined using autocorrelation function in order to test the similarity of the wave forms, Figure 10 and Figure 11 shows the autocorrelation function of LTE uplink with QPSK and 16 QAM respectively with 6, 15, 25 allocated resources blocks, the results shows as number of allocated resources blocks increase the similarity decreased and the signal reaches the inequality. ...
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... Long Term Evolution (LTE) of the Universal Mobile Telecommunication System (UMTS) also known as the Evolved Packet System (EPS) is a transilient move in the field of mobile communications [5] [6]. Such a revolution is necessitated by the unceasing increase in demand for high speed connections on networks, low latency and delay, low error rates and resilience because modern users and network applications have become increasingly dependent on these requirements for efficient functionality and performance. ...
... Instead, the Single-Carrier FDMA technique is used for LTE uplink transmission. [5] [11] OFDMA allocates individual users in the time and the frequency domain and its signal generation in the transmitter is based on the Inverse Fast Fourier Transform (IFFT) [6]. OFDMA converts the wide-band frequency selective channel into a set of many fading sub-channels, which enables optimum receivers to be implemented with reasonable complexity during MIMO transmission. ...
Long-Term Evolution (LTE) is a standard for high speed wireless communication for mobile devices and data terminals, It increases the capacity and speed using a different radio interface together with core network improvements. LTE employs SC-FDMA for uplink UL transmission and OFDM for downlink DL data transmission, in this paper LTE DL implemented with MATLAB programing and Simulink, Reference measurement channel RMC on DL waveform illustrated in different Transmission scheme of single , 4 antenna and cyclic delay diversity scheme CDD, duplexing mode, resources blocks and modulation approaches leadings to a various number of total information per frame, QPSK, 16 QAM and 64 QAM modulation approaches used in the proposed system are tested under AWGN Rayleigh fading channels.
Every year there is improving in the connection speed of mobile communication technology. Due to market requirements the wireless communication improves in addition of speed the reliability and functionality improves too. For digital telecommunication systems QAM considered as a modulation scheme, such as in 802.11 Wi-Fi standards. Efficiencies with high spectral can be done with QAM with a size of constellation that are suitable for specific application, limitation occur only by linearity of the communications channel and the noise level. In this paper 64 QAM modulator design, implemented and waveform generated using MATLAB Simulink with binary and gray symbol mapping, PN9 and 15-bit source, with Normal Raised Cosine NRC and Root Raised Cosine RRC filter effect on both time and frequency domain.
The next generation of Wi-Fi technology standard is Wi-Fi 6 which also known as 802.11ax Wi-Fi or AX Wi-Fi that performance’s improves and builds based on the current 802.11ac Wi-Fi standard. Wi-Fi 6 was built in originally to response with increasing and growing devices number in the world. In this paper Wi-Fi 6 implemented in Mat lab Simulink by using 10 WLAN units and tested under multi modulation schemes, BPSK, QPSK, 16 QAM, 64 QAM with data rate from 20 -160 MHz while 256 QAM and 1024 QAM with data rate 40 – 160 MHz, all tested under AWGN and Rayleigh fading channels in term of bet error rate BER where BPSK and QPSK show the least BER equal 10-8 at 12 dB of Eb/No in AWGN channel while BER of 1024 QAM at same Eb/No equal to 10-1, with Rayleigh fading channel BPSK and QPSK shows good performance as compared with other schemes of modulation.
For wireless broadband communication long-term evolution (LTE) is a standard for also mobile devices and data terminals, by using different radio interface together with core network improvements LTE increases the capacity and speed of mobile network. In this paper radio frequency receiver of radio-frequency long-term evolution (RF-LTE) is design and simulated using MATLAB Simulink, where the design based on illustrating parameters of each stage in LTE RF receiver from generating LTE waveform to error vector magnitude (EVM) measurements, where simulation results with 8 MHz bandwidth the transmitted signal power -3200 dBm, the received signal power (-140 to -160) dBm, while the demodulated signal reaches to -60 dBm difference between main loop and side loop witch lead to high confident recovered signal, also complementary cumulative distribution function (CCDF) measurements applied on output signals so that computes the power of complementary for cumulative distribution CCDF function from signal in time domain. Where CCDF curve shows value of time that a signal stand still above the level of average power for the measured signal or the probability of signal power will be above the level of average power.
The intensive use of broadband system leading to focusing of telecommunication development industries, which are characterized by high quality features. Forthisissue, high transmission abilities in a new technologies systems have been designed. the WiMAX concept were proposed where a wireless transmission infrastructure that allows a fast deployment as well as low maintenance costs. Based on the IEEE 802.16-2004 standard, in this paper an end-to-end baseband model of the physical layer of a wireless metropolitan area network (WMAN) have been implemented using MATALB Simulink, according to the IEEE® 802.16-2004 standard. Supporting all of the mandatory coding and modulation options. It also illustrates Space-Time Block Coding (STBC), an optional transmit diversity scheme specified for use on the downlink. it illustrates the use of digital pre-distortion, a technique for extending the linear range of a nonlinear amplifier. Also modulation sets have been changed and tested in the model to reduce running time and power consumption. Finally, measurements of Error vector magnitude EVM and modulation error ratio MER were performed.
