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參數(shù)資料
| 型號： | AD6652 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12-Bit, 65 MSPS IF to Baseband Diversity Receiver |
| 中文描述： | 12位，65 MSPS的IF到基帶分集接收機(jī) |
| 文件頁數(shù)： | 40/76頁 |
| 文件大?。?/td> | 1839K |
| 代理商： | AD6652 |
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AD6652
INTER
The AD6652 has two interpolating half-band FIR filters th
immediately precede the two digital AGCs a
RCF channel outputs. Each interpolating half-band takes
16-bit I and 16-bit Q data from the preceding RCF and output
16-bit I and 16-b
bypassed
directly
operate independently of each other—eith
or disabled. The control register for Half-Band A is
0x08 and for Half-Band B is at Address 0x09.
Rev. 0 | Page 40 of 76
POLATING HALF-BAND FILTERS
at
nd follow the four
s
it Q to the AGC. The half-band and AGC
opera e independently of each other, so the AGC can be
, in which case the output of the half-band is sent
to the output data port. The half-band filters also
er one can be enabled
at Address
a
f the
ethods:
hannels of the AD6652 are used to process
For example, if two c
one CDMA2000 carrier, RCF filters for both the channels
should be 180° out of phase. This can be done using RCF phas
decimation or an appropriate start hold-off counter followed
appropriate NCO phase offsets.
e
by
o
hannel 2. Each half-band interleaves
Half-band filters also perform the function of interleaving data
from various RCF channel outputs prior to the actual function
of interpolation. Interleaving of data is allowed even when the
half-band filter is bypassed. This allows the implementation of
polyphase filter by combining the processing power of multiple
channels to act upon a single carrier. This is accomplished by
appropriate phasing of the processing channels using one o
following m
RCF phase decimation
Start hold-off counter
Half-band A can listen to all four channels: Channels 0, 1, 2, and
3; Channel 0 and 1; or only Channel 0. Half-band B can listen t
Channels 2 and 3, or only C
the channels specified in its control register and interpolates by
two on the combined data from those channels. For one channel
running at twice the chip rate, the half-band can be used to
output channel data at four times the chip rate. The frequency
response of the interpolating half-band FIR is shown in
Figure 50.
MULTIPLES OF CHIP RATE
0
1.0
2.0
3.0
3.5
4.0
–70
–80
0.5
1.5
2.5
i
f
SAMP
f
CHIP
0
SPECTRUM OF HALF-BAND
d –60
–40
–10
–30
–50
f
SAMP
f
CHIP
0
Figure 50. Interpolating Half-Band Frequency Response
The SNR of the interpolating half-band is around 149.6 dB.
The highest error spurs due to fixed-point arithmetic are
around 172.9 dB. The coefficients of the 13-tap interpolating
half-ban
d FIR are given in Table 18.
Table 18. Half-Band Coefficients
0
14
0
66
0
309
512
0
309
0
66
0
14
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD6652BBC | 12-Bit, 65 MSPS IF to Baseband Diversity Receiver |
| AD6652BC | 12-Bit, 65 MSPS IF to Baseband Diversity Receiver |
| AD6652PCB | 12-Bit, 65 MSPS IF to Baseband Diversity Receiver |
| AD6816 | Interface For ATM User-Network Interface IC to Category #5 Unshielded Twisted Pair (UTP) system or a fiber optic system.(ATM用戶網(wǎng)絡(luò)接口與#5類非屏蔽雙絞線系統(tǒng)或其他光纖系統(tǒng)的接口芯片) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD6652BBC | 制造商:Analog Devices 功能描述:IF to Baseband Diversity Receiver 256-Pin CSP-BGA 制造商:Analog Devices 功能描述:IC IF TO BASEBAND RCVR SMD 6652 |
| AD6652BBCZ | 功能描述:IC IF TO BASEBAND RCVR 256CSPBGA RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:- 標(biāo)準(zhǔn)包裝:100 系列:* |
| AD6652BC | 制造商:AD 制造商全稱:Analog Devices 功能描述:12-Bit, 65 MSPS IF to Baseband Diversity Receiver |
| AD6652BC/PCB | 制造商:Analog Devices 功能描述:Evaluation Board With AD6652 And Software |
| AD6652BC/PCBZ | 制造商:Analog Devices 功能描述:DUAL CHANNEL ADC WITH QUAD CHA 制造商:Analog Devices 功能描述:DUAL CHANNEL ADC WITH QUAD CHANNEL RSP - Bulk |
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