Overview of radiolocation in CDMA cellular systems
نویسندگان
چکیده
منابع مشابه
Overview of Radiolocation in CDMA Cellular Systems
ireless location has received considerable attention over the past few years. A recent Report and Order issued by the U.S. Federal Communications Commission (FCC) in July 1996 requires that all wireless service providers, including cellular, broadband PCS, and wide-area SMR licensees, provide location information to Emergency 911 (E-911) public safety services [1]. These new FCC E-911 requireme...
متن کاملEvaluation of Multiusers' Interference on Radiolocation in CDMA Cellular Networks
Radiolocation has been previously studied for CDMA networks, the effect of Multiple Access Interference has been ignored. In this paper we investigate the problem of Radiolocation in the presence of Multiple Access Interference. An extensive simulation technique was developed, which measures the error in location estimation for different network and user configurations. We include the effects o...
متن کاملinvestigation of single-user and multi-user detection methods in mc-cdma systems and comparison of their performances
در این پایان نامه به بررسی روش های آشکارسازی در سیستم های mc-cdma می پردازیم. با توجه به ماهیت آشکارسازی در این سیستم ها، تکنیک های آشکارسازی را می توان به دو دسته ی اصلی تقسیم نمود: آشکارسازی سیگنال ارسالی یک کاربر مطلوب بدون در نظر گرفتن اطلاعاتی در مورد سایر کاربران تداخل کننده که از آن ها به عنوان آشکارساز های تک کاربره یاد می شود و همچنین آشکارسازی سیگنال ارسالی همه ی کاربران فعال موجود در...
Cdma Cellular Systems
Superposition coding techniques can be used to improve communications efficiency in a variety of scenarios. These techniques are particularly appropriate for applications in which there are spatial or temporal disparities in received signalto-noise ratios (SNRs). In this paper, we consider the application of superposition coding to increase the system capacity of the forward link in a CDMA cell...
متن کاملEM-based acquisition of DS-CDMA waveforms for radiolocation
ABSTRACT A handshaking protocol for radiolocation is considered using DS-CDMA packet transmission. The expectation maximization (EM) algorithm is employed for code delay acquisition. It is shown that the systematic application of EM on the flat-fading channel yields a parallel interference cancellation (PIC)-based technique for acquisition. On the frequency-selective channel, it is necessary to...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Communications Magazine
سال: 1998
ISSN: 0163-6804
DOI: 10.1109/35.667411