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| 型號(hào)： | PCF5083 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | STEEL COVER |
| 中文描述： | GSM信號(hào)處理IC |
| 文件頁(yè)數(shù)： | 79/136頁(yè) |
| 文件大小： | 602K |
| 代理商： | PCF5083 |
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1996 Oct 29
79
Philips Semiconductors
Objective specification
GSM signal processing IC
PCF5083
FB_search_fcb
This procedure searches for a frequency correction burst (FB) by scanning
9 or more timeslots. FB_search_fcb can be used on 26 or 51-frames
multiframe structure. When serving a traffic channel (TCH) the BCCH
carrier has to be scanned in the IDLE frames of the 26 multiframe structure
using search windows of 9 timeslots. After initialization with
FB_search_fcb_init (see below), FB_search_fcb has to be called in up to
11 consecutive IDLE frames. This time period is called an observation
interval, containing at least one FB.
The 51 multiframe structure is used in cell selection or IDLE mode and on
an SDDCH. If search windows of 9 timeslots are used to scan the BCCh
carrier, the search must be done by 15 successive calls to FB_search_fcb
within the following TDMA frames (N denotes the arbitrary TDMA frame
number of the first call):
N, N+2, N+4, N+6, N+8,
N+11, N+13, N+15, N+17, N+19,
N+22, N+24, N+26, N+28, N+30.
If the search window is extended to 17 timeslots, the search can be done
by 7calls at the frames:
N, N+3, N+6, N+9, N+12, N+15, N+18.
Values of fb_found are defined below:
fb_found =
1; the search has been aborted and no FCB has been found.
fb_found = 0; no FB has been found up to now, FB_search_fcb should be
called again in the next Idle frame.
fb_found = > 0; the search has been successful. fb_found FBs have been
found within n_obser_int observation intervals.
The return value fb_toi is the start of the FB in bits (1 bit = 3.69
μ
s) relative
to first complex sample of the observation window.
The fb_index indicates in which of the previous calls to FB_search_fcb the
FB has been actually found. If fb_index is zero, then the FB has been found
by fast detection during the current search. The fb_index =
1 means that
no FB has been found within the current observation interval, if this is
combined with fb_found > 0 the call cannot be located and only fb_toi can
be used.
39
fb_found
fb_toi
fb_index
DESCRIPTION
ID
PARAMETERS
RETURN
VALUES
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| PCF5083H/001/F2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GSM signal processing IC |
| PCF5083H/5V2/F3 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GSM signal processing IC |
| PCF5083H/F2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GSM signal processing IC |
| PCF51AC128ACFUE | 功能描述:32位微控制器 - MCU 32 Bit 128K FLASH 32K RAM CAN EN RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
| PCF51AC128ACLKE | 功能描述:32位微控制器 - MCU 32 Bit 128K FLASH 32K RAM CAN EN RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
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