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參數(shù)資料
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
文件頁數(shù)： 78/136頁
文件大小： 602K
代理商： PCF5083
1996 Oct 29
78
Philips Semiconductors
Objective specification
GSM signal processing IC
PCF5083
EM_ sync_burst
Adaptive viterbi equalizer for synchronization bursts. The 167 I and Q pairs
in IQ_BUFF are demodulated. The demodulated CMI values are also
stored in SCRATCH_BUFF.
snr is an estimation for the signal-to-noise ratio (0
≤
snr
≤
255)
The toi denotes the measured time difference (in quarterbits) between the
first information bit of the burst and the start of the sampling window.
Range: 0
≤
toi
≤
96. A toi value of 46 is the optimal position.
The foi_re and foi_im denote the real and imaginary part of the frequency
offset information. The frequency offset df (Hz) can be calculated in
accordance with equation:
36
snr
toi
foi_re
foi_im
FB_freq_estim
This procedure performs a frequency measurement by analysing the phase
of the 156 IQ samples located in IQ_BUFF.
The parameter threshold is the frequency estimation reliability threshold. If
it is not specified a default value of 3 will be used.
fb_qual = 0; indicates that no FCB has been detected, fb_qual > 0 means
that an FCB has been found. The fb_qual may be used as reliability
information.
The return value fb_foi is the measured frequency offset information in
Hertz. fb_foi = received frequency
frequency of local oscillator.
FB_freq_estim_init
66
[threshold]
fb_qual
fb_foi
This routine initialises all internal counters that are used for averaging by
FB_freq_estim and FB_estim_eval. It is not necessary to call
FB_freq_estim if averaging via FB_freq_estim_eval is not required.
FB_freq_estim_eval
65
The procedure performs a weighted averaging over all previous results of
FB_freq_estim.
The parameter threshold is the frequency estimation reliability threshold
(recommended value: tbf).
fb_flag = 0 indicates that no FCBs have been detected.
fb_flag = 1 indicates that at least one FCB has been detected.
The return value fb_foi is the measured frequency offset information in
Hertz. fb_foi = received frequency
frequency of local oscillator.
67
threshold
fb_flag
fb_foi
DESCRIPTION
ID
PARAMETERS
RETURN
VALUES
f
df
foi_re
663
×
------foi_im
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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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