By Samuel Sheng, Robert W. Brodersen
ISBN-10: 1461374928
ISBN-13: 9781461374923
ISBN-10: 1461554578
ISBN-13: 9781461554578
Low-Power CMOS instant Communications: A Wideband CDMA process Design specializes in the problems at the back of the advance of a high-bandwidth, silicon complementary metal-oxide silicon (CMOS) low-power transceiver method for cellular RF instant information communications. within the layout of any RF communications process, 3 detailed components needs to be thought of: the propagation atmosphere in query, the multiplexing and modulation of consumer information streams, and the complexity of required to enforce the specified hyperlink. None of those may be allowed to dominate. Coupling among approach layout and implementation is the main to at the same time attaining excessive bandwidth and coffee strength and is emphasised through the e-book.
the fabric provided in Low-Power CMOS instant Communications: AWideband CDMA process Design is the results of broadband instant platforms examine performed on the college of California, Berkeley. The instant improvement was once encouraged by way of a miles greater collaborative attempt often called the Infopad undertaking, which was once established on constructing a cellular details terminal for multimedia content material - a instant `network computer'. the need for mobility, mixed with the necessity to help probably thousands of clients concurrently getting access to full-motion electronic video, demanded a instant answer that was once of a long way reduce strength and better facts price than can be supplied through present structures. That resolution is the subject of this booklet: a case research of not just instant platforms designs, but additionally the implementation of any such hyperlink, right down to the analog and electronic circuit level.
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Additional resources for Low-Power CMOS Wireless Communications: A Wideband CDMA System Design
Example text
However, settling time, temperature stability, phase noise, and other nonidealities in the baseband oscillator often complicate the system design. Today, a direct-digital frequency synthesizer can generate the baseband signals [NichoI91], without any of the difficulties encountered with analog designs. The use of digital baseband processing allows one to limit all of the analog hardware to the passband conversion circuitry, and opens the possibility of simplifYing the analog hardware at the expense of more complicated baseband processing.
Advances in Statistical Signal Processing Vol. 2: Signal Detection. pp. 369-409. Greenwich. CT: JAI Press. 1993. [Verdu97] S. Verdu. " Intelligent Methods in Signal Processing and Communications. D. Docarnpo. A. Figueiras-Vidal. F. Perez-Gonzalez. eds. pp. 15-44. Boston: Birkhauser. 1997. 3 System Overview: The Broadband CDMA Downlink Base Station Transmitter Baseband Transmit Modulator p RF Upconversion Mobile Receiver Receiver Baseband Ana log RF Front-End Digital Signal Processing From the preceding discussion, the ability of a synchronous COMA system to "reject" additive noise and multipath interference, combined with potential reductions in implementation complexity, makes it the multiple access strategy of choice for the broadband downlink.
The p/t) signals described above are idealized, continuous-time signals with delta-function cross correlation. In practice, the {Pj(t)} are bandlimited, having been generated by digital logic and then filtered; it is impossible to achieve delta-function cross correlation with such signals. In fact, the signals are bandlimited to the smallest fraction possible above lIT chip possible, because of spectral efficiency concerns. Thus, the h} can be resolved to no better than Tchip in time by the receiver; if several arrivals happen within a single period T chip , they can be considered to blur into a single arrival: these are called the resolvable arrivals.
Low-Power CMOS Wireless Communications: A Wideband CDMA System Design by Samuel Sheng, Robert W. Brodersen
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