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參數(shù)資料
| 型號： | AHA4541A-PQC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 311 MBITS/SEC TURBO PRODUCT CODE ENCODER/DECODER |
| 中文描述： | 311 Mbits /秒Turbo乘積碼編碼/解碼器 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 217K |
| 代理商： | AHA4541A-PQC |
comtech
aha
corporation
FUNCTIONAL OVERVIEW
The channel encoder is designed to input data in
a byte-wide fashion. This data is CRC encoded and
randomized before coding by the TPC encoder.
Synchronization marks are then inserted into the
data before it is mapped to a user programmable
constellation. The blocks may be bypassed if not
needed.
Each symbol for modulation is output
synchronous to the transmit clock, with one symbol
transferred for each rising edge of the clock. The
format for output data depends on the modulation
format chosen.
The channel decode data path begins with
received symbols input to the device synchronous to
the receive clock, with one symbol transferred per
rising edge.
When using internal soft metric computation,
the input data is an I and Q sample value for the
given symbol. The soft metric computation engine
converts each I and Q sample to the soft metrics
required by the TPC decoder.
When soft metric computation is disabled, the
input data is a soft metric value for each bit in the
TPC block with up to 4 bits transferred on each
clock edge. Each bit would consist of up to 4
confidence bits per data bit. If enabled, all
synchronization is controlled by the device
including phase ambiguity resolution. Output is in a
byte wide fashion with packet start, end and error
signals.
CODE PERFORMANCE
Figure 2:
Bit Error Rate (BER) Performance (simulated) on a QPSK Channel
bpsk_oc3
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相關代理商/技術參數(shù) |
參數(shù)描述 |
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| AHA4541A-PQI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:311 MBITS/SEC TURBO PRODUCT CODE ENCODER/DECODER |
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