| Title: |
An adaptive asynchronous CDMA receiver and its convergence
analysis
|
| Author: | |
| Document Type: |
Thesis
|
| Department: |
Department of Electrical and Computer Engineering
|
| Degree: |
Master of Science
|
| Major: |
Electrical Engineering
|
| Advisory Committee: |
Siveski, Zoran
Ansari, Nirwan
Bar-Ness, Yeheskel
|
| Thesis Date: |
1995, January
|
| Keywords: |
Code Division Multiple Access
Data Transmission Systems
|
| Availability: |
Unrestricted
|
| Abstract: |
An adaptive CDMA receiver scheme assuming perfect synchronization has been generalized in this thesis to the asynchronous channel, a much more practical assumption of the real system. Similar formulas are derived and as its synchronous version, it is still near-far resistant and requires no knowldge [sic] of received signal amplitudes and training sequences. Thus, sophisticated high-precision power control and user power estimation are not necessary and the receiver is particularly useful in mobile communications since it can adjust itself adaptively to changes in the power of the users. Tile convergence and transient behavior of the receiver are also investigated and found to have similar results to its synchronous counterpart. A new way to analyze the error performance of the decorrelator is also proposed and the error probability of the one-shot decorrelator is formulated for the general case in an alternative way using the new idea, which is much simpler. Furthermore, the singularity problem associated with the one-shot decorrelator is addressed and its effect on the performance of the receiver is discussed. |
| Complete Thesis: |
njit-etd1995-010
(55 pages ~ 3,480 KB pdf)
|
| Download by Chapters: |
Front
Matter (Title Page, Abstract, Table
of Contents, etc. ~ 9 pages ~ 696 KB pdf)
Chapter
1: Introduction (3 pages ~ 415 KB pdf)
Chapter
2: System Model (3 pages ~ 254 KB pdf)
Chapter
3: Decorrelator (12 pages ~ 914 KB
pdf)
Chapter
4: Adaptive Weights (9 pages ~ 401
KB pdf)
Chapter
5: Error Performance at the Output (7
pages ~ 333 KB pdf)
Chapter
6: Conclusion (2 pages ~ 70 KB pdf)
Appendix
A: Decorrelator (two-user case) (5
pages ~ 192 KB pdf)
Appendix
B: Weights (two-user case) (5 pages
~ 211 KB pdf)
Appendix
C: Error Probability at the Output (two-user case) (2
pages ~ 103 KB pdf)
Appendix
D: Expectations (2 pages ~ 75 KB pdf)
Appendix
E: System Structure (3 pages ~ 95 KB
pdf)
References
(2 pages ~ 152 KB pdf)
|
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