... region
should increase linearly in each dimension as ρ increases lin-
early in dB. As a result, we would also expect the outage ca-
pacity region to increase linearly in each dimension as ρ in-
creases. ... since
one mobile may transmit at any time. A tighter inner bound
may be obtained by allowing the two mobiles to transmit si-
multaneously, but without the coordinating virtual central
processing ... Signal Processing 2004:9, 1288–1298
c
2004 Hindawi Publishing Corporation
Bounds on the Outage-Constrained Capacity Region
of Space- Division Multiple- Access Radio Systems
Haipeng Jin
Center for...
... to Summon Information 380
19.6 Pointing to the Real World 380
19.7 Pointing Greatly Simplifies the User Interface 381
19.8 Uses of Pointing 382
19.9 Software Architecture 382
19.9.1 Introduction ... DSP in the Pointing System 383
19.11 Pointing Enhanced Location Applications 384
19.11.1 Pedestrian Guidance 385
19.11.2 Pull Advertising 386
19.11.3 Entertainment 386
19.12 Benefits of Pointing ... Personal Mobile Gateway
TM
(IXI Mobile Inc.)
the following steps must be performed to reverse each of the corresponding steps in the
transmitter:
† De-multiplexing of transport channels
† De-interleaving...
... mobility. Terminals moving fast in a dense network would
necessitate a lot of cell updates, increasing the RACH load, but would then need to be
paged inmultiple cells in case of downlink-originated ... not
retained, and to allow reordering to be done for single packet streams the reordering
functionality needs to be combined with macro-diversity combining in MAC-es. Thus,
the new MAC-es in- sequence ... rate of 384 kbps both in downlink and in uplink. The initial terminals and networks
were limited to 64–128 kbps in uplink while the latest products provide 384-kbps uplink.
1.2 HSPA standardization...
... computational model inspired by evolution.
It represents feasible solutions in terms of individuals with
genomes, and determines which individuals could survive in
a certain criterion formulated ... planning. In [2], a binary
string representation, the classic representation method of
genetic algorithm, is applied. That is, candidate solutions are
encoded as chromosome-like bit strings. In ... to
explain how the GA works. According to the schema theo-
rem, short, low-order, and above-average schemata receive
exponentially increasing trials in subsequent generations.
This proves that the individuals...
... The values in
the table have been determined for a solution using turbo
decoding and they do not include chip-le vel decoding and
symbol level combining that further increase the processing
needs.
The ... anything in between 1-2 cycle
instruction set extensions and peripheral devices executing
thousands of cycles can result in grossly inefficient software.
If the interrupt latency in the operating ... hardware interrupt
5, 6
= interrupt service and acknowledge interrupt to HW
9, 10
= high-priority running due to interrupt
1, 12
= interrupted low-priority task
Figure 6: Controlling an accelerator interfaced...
... estimation schemes suitable for interleave -division multipleaccess (IDMA) systems are presented. Training and data
are superimposed. Training-based and semiblind linear channel estimators are derived ... “Adaptive interleave -division
multipleaccess a potential air interface for 4G bearer ser-
vices and wireless LANs,” in Proceedings of the 1st IFIP Inter-
national Conference on Wireless and Optical Communications
Networks ... “Adaptive 4G up-
link proposal based on interleave -division multiple access, ” in
Proceedings of General Assembly of International Union of Radio
Science (URSI ’05), New Delhi, India, October 2005.
[12]...
... 64
2.8 MultipleAccess Performance of Frequency-Hopped
Code DivisionMultipleAccess 67
2.9 Summary 71
3. Cellular Code DivisionMultipleAccess 73
3.1 Principles of Cellular Code DivisionMultiple ... techniques such as time division
multipleaccess and frequency divisionmultiple access. Additionally, random access schemes
such as carrier sense multipleaccess are examined.
In Chapter 2, basic ... causing interference to another user. The orthogonality can be created
either in the time domain or in the frequency domain. In TDMA, users simply transmit at
different times, thus maintaining...
... including a provision to compensate
subscribers in case of delay in porting or abuse of porting by them or on their behalf.
4.2.3 Mobile termination charges
Call termination charges into mobile ... performance indicator chosen in this study for
the mobile communications industry.
5.1.1.1 Productivity
Productivity of service industries and especially mobile communications is hard to define.
Indeed, ... these findings can’t be compared with findings in
previous studies on mobile telecommunications, since most of them do not consider this
performance indicator. Only very few studies examine the...
... techniques such as time division
multipleaccess and frequency divisionmultiple access. Additionally, random access schemes
such as carrier sense multipleaccess are examined.
In Chapter 2, basic ... 15:54
vi
Contents
1. Multiuser Communications 1
1.1 Conflict-Free Medium Access Control 2
1.1.1 Time DivisionMultipleAccess 3
1.1.2 Frequency DivisionMultipleAccess 5
1.1.3 Code DivisionMultipleAccess 6
1.1.4 ... 64
2.8 MultipleAccess Performance of Frequency-Hopped
Code DivisionMultipleAccess 67
2.9 Summary 71
3. Cellular Code DivisionMultipleAccess 73
3.1 Principles of Cellular Code Division Multiple...
... for
Code DivisionMultiple Access
In the previous chapter, we reviewed the basic concepts of multiuser communications and the
multiple access techniques used to allow multiple users to communicate. In ... and fading channels as well as their multipleaccess capabilities.
Both techniques rely on spreading waveforms to accomplish pseudo-random spreading. A key
to CDMA is defining multiple spreading ... exploited to provide multiple access. Inmultipleaccess systems, we are concerned
1
Some make a distinction between CDMA and SSMA in that CDMA specifically designs its spreading waveforms
to have...