M7. UWB measurement in both the time and frequency domain for comparison purpose (November 2014). Because the comparison of the frequency and time domain UWB channel analysis has been (according our best knowledge) published briefly only in one paper, we performed comparative measurements keeping the fixed antenna positions for the both domain. The channel transfer functions were measured using VNA E5071C ENA, while the CIR measurement was done using the high speed (12 Gbps) bit sequence generator built in BER tester MP1800A and Oscilloscope DPO 72004C. This approach brings some advantages compared to M2 (e.g. correlation gain, uniformly distributed power over the time) and will be used for future measurements.
In this measurement campaign, we performed comparative measurements keeping the fixed antenna positions for the both frequency and time domain. The channel transfer functions were measured using vector network analyzer Agilent E5071C while the CIR measurement was based on transmitting of binary sequence using the high speed (12 Gbps) bit sequence generator built in BER tester MP1800A and Oscilloscope DPO72004C. This approach brings some benefits (e.g. correlation gain, uniformly distributed power over the time) compared to the measurements of UWB in-vehicle channel in time domain performed on 21 May 2014. Figure 1 and Figure 2 depict the interconnections of the apparatus of the measurement setup working in frequency or time domain, respectively. The frequency domain measurement setup is the same as the measurements of UWB in-vehicle channel on 17 Oct and 7 Nov 2013.
VNA specifications for MMW measurement:
- Start frequency 3 GHz
- Stop frequency 11 GHz
- Bandwidth 8 GHz
- Frequency step size 10 MHz
- Number of points 801
- IF bandwidth 100 Hz
- Dynamic range > 90 dB
- Output power 5 dBm
Equipment of FD measuring workplace:
- Vector Network Analyzer Agilent E5071C
- Phase-stable coaxial cables SUCOFLEX 104P
- Conical monopole antennas
- JOBY GorillaPod
- Vacuum glass holders
- SMA female to SMA male 90-deg bend adapters
- SMA female to SMA female straight adapters
Equipment of TD measuring workplace:
- Signal quality analyzer Anritsu MP1800A
- Digital & mixed signal oscilloscope Tektronix DPO72004C
- Broadband power amplifier WENTEQ ABP-1200-01-1825
- Broadband low noise amplifier WENTEQ ABL-1200-08-3220
- Conical monopole antennas
- Phase-stable coaxial cables SUCOFLEX 104P
- JOBY GorillaPod
- Vacuum glass holders
- SMA female to SMA male 90-deg bend adapters
- SMA female to SMA female straight adapters
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Related publications:
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BLUMENSTEIN, J.
Intra-Vehicular Path Loss Comparison of UWB Channel for 3–11 GHz and 55–65 GHz
IEEE International Conference on Ubiquitous Wireless Broadband ICUWB’2015, accepted for publication.
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