Rohde & Schwarz R&S FSL3 - Cinr

R&S FSL WiMAX, WiBro Measurements (Options K92/K93)
1300.2519.12 2.153 E-11
CINR
See [6] section "8.3.9.3 CINR mean and standard deviation''. The result summary provides the Carrier
Interference Noise Ratio [CINR] statistics according to the standard. One possible method to estimate
the CINR of a single message is to compute the ratio of the sum of signal power and the sum of
residual error for each data sample, using equation [6] (92).
%
%

=

=

=
1
0
2
1
0
2
],[],[
],[
][
N
n
N
n
nksnkr
nks
kCINR
with
r[k,n] received/measured sample n within message k
s[k,n] corresponding detected/reference sample (with channel state weighting)
corresponding to received symbol n
The CINR statistics of the result summary is calculated as follows:
1. CINR row:
Statistic {min, mean, max} of the CINR[k].
The mean value is
d
BCINR
µ
ˆ
[k] according to [6] formula (94).
2. CINR Standard Deviation row
dBCINR
/
ˆ
according to [6] formula (96).
Literature
[1] Speth, Classen, Meyr: ''Frame synchronisation of OFDM systems in frequency selective fading channels", VTC '97,
pp. 1807–1811
[2] Schmidl, Cox: ''Robust Frequency and Timing Synchronization of OFDM", IEEE Trans. on Comm., Dez. 1997, pp. 1613–
621
[3] Minn, Zeng, Bhargava: ''On Timing Offset Estimation for OFDM", IEEE Communication Letters, July 2000, pp. 242–244
[4] Speth, Fechtel, Fock, Meyr: ''Optimum Receiver Design for Wireless Broad–Band Systems Using OFDM – Part I", IEEE
Trans. On Comm. VOL. 47, NO 11, Nov. 1999
[5] Speth, Fechtel, Fock, Meyr: ''Optimum Receiver Design for Wireless Broad–Band Systems Using OFDM – Part II", IEEE
Trans. On Comm. VOL. 49, NO 4, April. 2001
[6] IEEE 802.16–2004, Part 16: Air Interface for Fixed Broadband Wireless Access Systems; 1 October 2004; Medium
Access Control (MAC) and Physical Layer (PHY) specifications
Signal Processing of the IEEE802.16–2005 OFDMA/WiBro
Measurement Application
Symbol Description
klkl
aa
,,
ˆ
, data symbol (actual, decided)
res
f residual carrier frequency offset
coarse
ˆ
, ff 
carrier frequency offset between transmitter and receiver (actual, coarse estimate)
0
relative sampling frequency offset
l
g gain
klkl
HH
,,
ˆ
,
channel transfer function (actual, estimate)
i time index
finecoarse
ˆ
,
ˆ
ii timing estimate (coarse, fine)