نتایج جستجو برای: دمدولاتور bpsk
تعداد نتایج: 1172 فیلتر نتایج به سال:
Using this assumption, the Bit Error Rate BER for BPSK, QPSK, 4PAM. The same case is between 64QAM and 16 QAM6db difference. Http:www.nxp.comacrobatdownloadapplicationnotesAN970471.pdfSince this scheme depends on the difference between successive phases, it is. In this latter case, the BER of QPSK is exactly the same as the BER of BPSK.Conditional pdf. Encode the information in phase difference...
In mobile communications, power is a very important factor and nonlinear amplification of power amplifiers cannot be avoided due to their high power efficiency. This article presents the performance of 2 -shift BPSK modulation scheme used in DS/SS/CDMA wireless communications over multipath Rayleigh fading channel and compares the performance with the performance of conventional BPSK CDMA syste...
In this paper, we have evaluated Bit Error Rate (BER) performance of interleave-division multiple-access (IDMA) systems with BPSK & QPSK modulation techniques when the system is subjected to Additive White Gaussian Noise (AWGN) in the channel. The BPSK and QPSK modulation techniques are already well trusted techniques with codedivision multiple-access (CDMA) systems however, IDMA scheme is refe...
Efficient data transmission requires efficient modulation and demodulation techniques, both for terrestrial radio links and for satellite communications. Unfortunately, most amateur transmissions still use rather inefficient FSK modulation. Although an incoherent FM transceiver may look simpler than a coherent PSK transceiver, the practical implementation of either design is equally demanding. ...
Binary Phase Shift Keying (BPSK) is a promising modulation format for downlink data transmission in inductive biomedical telemetry systems, because it achieves high data rates and power efficiencies and requires simple electronics. In this paper, the Bit Error Rate (BER) performance of a BPSK biomedical telemetry system is investigated under Additive White Gaussian Noise (AWGN) and is found to ...
The envelope of Autocorrelation Function (ACF) of BOC signal has a narrower main lobe that enables higher resolution of acquisition and tracking. However, the existence of multiple secondary peaks and multiple zero crossings can cause signal detection missing and false lock. In order to get rid of this ambiguity, several methods are proposed, such as oversampling, sub-carrier phase cancellation...
ارتباطات بی سیم برد کوتاه با توان مصرفی پایین، بیشترین تقاضا را بین همه ارتباطات بی سیم دارا است. دستگاه های ارتباطی که بتوانند با یک باتری، بدون نیاز به تعویض آن، به مدت چندین سال به کار خود ادامه دهند، می توانند پیاده سازی کاریرد هایی که در آن ها تعویض باتری غیر ممکن یا بسیار گران است را امکان پذیر سازند. استاندارد ieee 802.15.4/zigbee برای پوشش کاربرد هایی با توان مصرفی پایین و همچنین هزینه...
FSO (Free-Space Optical Communications) is a type of optical communication that transmitted over an open space. The irradiance fluctuation in clear atmosphere caused by Temperature variations the are minor but erratic. As result, Signal-to-Noise Ratio (SNR) reduced, and performance reduced. BPSK has best when scintillation not considered. Thus, investigated this work under impact air turbulence...
در این پایان نامه هدف طراحی و شبیه سازی دمولاتور gmsk در قالب استاندارد dect می باشد. ما به دنبال ساختاری می باشیم که تا حدی مزایای هر دو روش همدوس و ناهمدوس را دارا بوده و از نظر پیاده سازی نیز ساده باشد. به همین منظور روش pll دمدولاتور را که یک روش شبه همدوس می باشد انتخاب می نمائیم. گیرنده های استاندارد dect برای کاربردهای داخل ساختمان پیشنهاد شده اند، ولی اخیرا کاربردهای آن در مخابرات شخصی ...
The arbitration decision by BPSK, can be filed with objections in accordance Law 8/1999 and annulment under 30/1999. These two actions raise questions related to the process resolve consumer disputes, protection, impact of Constitutional Court’s on awards. This is because both are contrary final binding nature award. Through doctrinal research method, it was found that three years since Decisio...
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