參數(shù)資料
型號(hào)： HFA3861
廠商： Intersil Corporation
元件分類： 基帶處理器
英文描述： Direct Sequence Spread Spectrum (DSSS) baseband processor(直接序列擴(kuò)頻基帶處理器)
中文描述： 直接序列擴(kuò)頻（DSSS）基帶處理器（直接序列擴(kuò)頻基帶處理器）
文件頁(yè)數(shù)： 16/35頁(yè)
文件大?。?/td> 218K
代理商： HFA3861
16
PN Correlators Description
There are two types of correlators in the HFA3861 baseband
processor. The first is a parallel matched correlator that
correlates for the Barker sequence used in preamble,
header, and PSK data modes. This PN correlator is
designed to handle BPSK spreading with carrier offsets up
to
±
50ppm and 11 chips per symbol. Since the spreading is
BPSK, the correlator is implemented with two real
correlators, one for the I and one for the Q Channel. The
same Barker sequence is always used for both I and Q
correlators.
These correlators are time invariant matched filters otherwise
known as parallel correlators. They use one sample per chip for
correlation although two samples per chip are processed. The
correlator despreads the samples from the chip rate back to the
originaldatarategiving10.4dBprocessinggainfor11chipsper
bit. While despreading the desired signal, the correlator
spreads the energy of any non correlating interfering signal.
The second form of correlator is the correlator function used
for detection of the CCK modulation. For the CCK modes,
PREAMBLE/HEADER
CRC-16
GENERATOR
TX_AGC_IN (18)
V
REF
(16)
I
REF
(21)
SPARE (39)
(60) CCA
TX_DATA
SCRAMBLER
(58) TXD
P
(52) RXCLK
MODULATOR,
BARKER/CCK
TXI (23, 24)
TXQ (29, 30)
TIMING
GENERATOR
MCLK
(12, 17, 22, 31)
V
DD
(ANALOG)
(2, 8, 37, 41, 57)
V
DD
(DIGITAL)
(9, 15, 20, 25, 28)
GND (ANALOG)
(1, 7, 36, 43, 56)
GND (DIGITAL)
(55) TXCLK
(59) TX_RDY
(62) TX_PE
ANTSEL (40)
(4) SCLK
(3) SD
(64) SDI
(5) R/W
(6) CS
S
P
T
P
(42)
MCLK
T
(45)
T
(44)
(46)
T
(47)
T
(48)
T
(49)
T
(50)
T
(51)
T
TEST PORT
FIGURE 11. DSSS BASEBAND PROCESSOR, TRANSMIT SECTION
TX AGC
CONTROL
TRANSMIT
FILTER
O
T
O
DAC
DAC
TX
STATE
CONTROL
TX_IF_AGC (35)
6-BIT
DAC
REGISTER
6-BIT
ADC
HFA3861
相關(guān)PDF資料
PDF描述
HFA3861IV Direct Sequence Spread Spectrum Baseband Processor
HFA3861IV96 Direct Sequence Spread Spectrum Baseband Processor
HFA3925 2.4GHz - 2.5GHz 250mW Power Amplifier(2.4GHz - 2.5GHz 250mW 功率放大器)
HFA3926 2.0GHz - 2.7GHz 250mW Power Amplifier(2.0GHz - 2.7GHz 250mW 功率放大器)
HFA3926IA 2.0GHz - 2.7GHz 250mW Power Amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HFA3861A 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processo
HFA3861AIN 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processo
HFA3861AIN96 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processo
HFA3861B 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processor
HFA3861BIN 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processor
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