後三代行動通訊處理器設計(3/3)
Date Issued
2005-07-31
Date
2005-07-31
Author(s)
DOI
932213E002018
Abstract
In the “Beyond 3G” mobile communication systems, it is expected to be capable of
delivering higher data rate service for distributed users in extremely unpredictable wireless
channel. Thus it would be very important to design air interface that has high capacity
multiple-access schemes to transmit burst-type multimedia data packet with different
quality-of-service (QoS).
Multi-carrier code-division multiple-access (MC-CDMA) has been a promising technique
to meet the demand of “Beyond 3G” systems. It combines advantages of multi-carrier
transmission such as robustness to frequency-selective fading and multiple-access capabilities of
CDMA. In addition, MC-CDMA is suitable for multi-rate multimedia data transmission.
In this three-year project, we investigated a novel frequency domain approach for multi-user
detection in DS-CDMA systems. Phase synchronization for well-known multi-carrier technique,
orthogonal frequency-division multiplexing (OFDM), was studied. Multi-user detection scheme
of multi-rate MC-CDMA where we focused on multi-tone CDMA (MT-CDMA) was proposed
and the corresponding performance evaluation was given. To make the radio resource allocation
(RRA) in MC-CDMA more efficient, we further propose a joint rate, sub-carrier and power
allocation algorithm with LMMSE multi-user detection. In addition to the physical layer
consideration in “Beyond 3G” receiver design, we also consider wireless ad hoc network
clustering issues which may be a widespread network topology in the future generation wireless
communication systems.
Subjects
Beyond 3G
synchronization
multi-user
CDMA
OFDM
phase noise
multi-rate
multi-carrier
resource allocation
ad hoc networks
clusters
QoS
Publisher
臺北市：國立臺灣大學電信工程學研究所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
932213E002018.pdf
Size
486.96 KB
Format
Adobe PDF
Checksum
(MD5):68317cc6dc46601a576dc974d447a38f