Áp dụng DSP lập trình trong truyền thông di động P14 pot
Áp dụng DSP lập trình trong truyền thông di động P14 pot
... the encoded digital audio. The audio encoder
dynamically measures audio complexity and adjusts data throughput accordingly, without
compromising the quality of the encoded digital audio [8].
The ... (synchronization)
† Decoding of the FIC
† Time and frequency de-interleaving and Viterbi decoding
† Audio source decoding from MPEG 1 Layer II (MUSICAM) coded audio to linear PCM
audio
Demodulatio...
Áp dụng DSP lập trình trong truyền thông di động P7 potx
... real-time DSP in an application, the implemen-
tation of a DSP solution involves the use of many ingredients: analog to digital converters,
digital to analog converters, ASIC, memories, DSPs, microcontrollers, ... therefore centered more on ‘‘ disguising a RISC processor as a
DSP ’ or using small DSP coprocessors. In the case of the latter, the excess burden of the DSP
Enabling Multi...
Áp dụng DSP lập trình trong truyền thông di động P9 pot
... applications.
Improved coding efficiency can be obtained by coding the difference between consecutive
samples, using a method called differential PCM (DPCM). In predictive coding, the differ-
ence that ... of immediately preceding samples:
~
sðnÞ¼
X
p
k¼1
aðkÞ sðn 2 kÞ;
where
~
sðnÞ is the predicted value of s(n), a(k), 1 # k # p are the predictor coefficients, and p is
the order of the predict...
Áp dụng DSP lập trình trong truyền thông di động P15 potx
... C54x fixed-point DSP is a signal processor commonly used in cellular phones, digital
audio players, and other low-power communications devices [4]. The TI core uses an
advanced modified Harvard architecture ... TMS320C6204, Fixed Point Digital Signal Processor, Document SPRS152A, October
2000, Revised June 2001.
[13] Verbauwhede, I., Nicol, C., ‘Low Power DSP s for Wireless Communications,’...
Áp dụng DSP lập trình trong truyền thông di động P17 pot
... DSPs in Mobile Communications356
Figure 17.20. Die photo of Maia
sing elements. An example of this approach is the two-level network structure used in the
PADDI-2 multiprocessor [10]. In PADDI-2, ... token of a one-dimensional data structure
or the last data token of a one-dimensional sub-structure of a two-dimensional data structure.
The value 2 marks the last data token of a two-dimensional...
Áp dụng DSP lập trình trong truyền thông di động P19 potx
... System
Use of the DSP in pointing designs will vary depending on the actual DSP/ MCU combination
within the cell-phone and on the scheduling and duration of other DSP tasks.
DSP loading will determine ... Power on the heading sensing circuit
2. Reset each axis of the heading sensor
3. Take a number of heading readings (number is based on available time)
4. Average the heading readings...
Áp dụng DSP lập trình trong truyền thông di động P1 ppt
... focusing on signal processing DSP designers have put
programmable DSPs at the heart of many consumer devices, including mobile communica-
tion systems. Recently DSPs have been specialized to ... past and in the future. We highlight different perspectives,
especially regarding implementation issues, in the processing of speech, audio, video, future
multimedia and location-based services as ....
Áp dụng DSP lập trình trong truyền thông di động P2 pdf
... power
consumption of the DSP. In addition, parallelism can be used to increase the number of
The Application of Programmable DSPs in Mobile Communications18
Figure 2.5 Power dissipation trends in DSP
1976, ... in GSM, in ’Applications of Digital Signal Processing’,
Proceedings of DSP9 4 UK, 1994, and in Technologist Proceedings, Herzlya, Israel, November 1995.
The History of DSP Based A...
Áp dụng DSP lập trình trong truyền thông di động P3 ppsx
... to the DSP through a standardized interface. Therefore
TCCs benefit from the DSP addressing capability, DSP address/data bus bandwidth, internal
registers and common DSP memory space. Additionally ... Channel
CDMA Code Division Multiple Access
DBB Digital Base Band
DLL Delay Locked Loop
DSP Digital Signal Processor
ETSI European Telecommunications Standards Institute
FDD Frequency Di...
Áp dụng DSP lập trình trong truyền thông di động P4 pdf
... they are closely related.
The most DSP intensive functions are the two types of channel decoding: convolutional
decoding and turbo decoding. Convolutional encoding is used for low data rate frames ... with a DSP was also achieved by memory mapping the device, by
allowing block data transfers for input and/or output to be simultaneous with decoding, and
by providing various signal lines fo...
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