منابع مشابه
W-CDMA random access channel transmission enhancement for satellite-UMTS
The random access channel (RACH) is an uplink shared channel for initial channel access to the network as well as for short data bursts. In this paper, we propose modifications to the RACH preamble for satellite-UMTS using higher order of Hadamard codes, and it is shown that these enhancements have a better performance than that of the current Third Generation Partnership Project (3GPP) specifi...
متن کاملMulti - Antenna Systems & Interconnection Strategies for CDMA Wireless Access Networks
Interference management is utmost important in CDMA systems, since any reduction in interference translates into a direct increase in capacity. The main objective of this thesis is to utilize antennas in novel ways so as to achieve performance bene ts at the system level through spatial interference management. To this end, we study CDMA multi-antenna wireless access networks (where the transmi...
متن کاملMulticarrier Orthogonal-CDMA for Fixed Wireless Access Applications
Recently, in the United States the FCC allocated a significant amount of bandwidth in different parts of the radio frequency spectrum for point-to-multipoint fixed wireless bidirectional communications. This includes parts of the 2 to 3 GHz bands, parts of the 5 to 6 GHz (known as U-NII) bands, and parts of the millimeter wave spectrum between 27 to 31 GHz (known as LMDS bands). In general, bro...
متن کاملTMS320TCI6488 W-CDMA DSP SoC
Introduction This white paper will highlight the Digital Signal Processor (DSP) based System-onChip (SoC) approach for high-performance wireless Base Stations. TI’s TMS320TCI6488 device will be used as an example to highlight the benefits of a flexible DSP SoC approach for W-CDMA baseband processing. A DSP SoC can provide a single-chip solution, lower power usage, better performance, more fruga...
متن کاملThe random early detection concept applied to the W-CDMA UMTS medium access control
In this work we introduce the concept of Random Early Detection (RED) to a medium access control (MAC) protocol applicable to the W-CDMA UMTS access interface. The concept is in general applicable to MAC protocols that use channel load information to regulate the access to a CDMA channel. By making the analogy of a CDMA channel as if it was a queuing system of certain capacity, RED prevents the...
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: The Journal of the Institute of Image Information and Television Engineers
سال: 2001
ISSN: 1881-6908,1342-6907
DOI: 10.3169/itej.55.368