Abstract
Extensive measurements are conducted in room environments at 60 GHz to analyze the channel characteristics for various channel configurations. Channel parameters retrieved from measurements are presented and analyzed based on generic channel models. Particularly, a simple single-cluster model is applied for the parameter retrieval and performance evaluation. By this model, power delay profiles are simply described by a K-factor, a root-mean-squared delay spread, and a shape parameter. The considered channels are configured with the combination of omnidirectional, fan-beam, and pencil-beam antennas at transmitter and receiver sides. Both line-of-sight (LOS) and non-LOS (NLOS) channels are considered. Further, to evaluate the transmission performance, we analyze the link budget in the considered environments, then design and simulate an OFDM system with a data rate of 2 Gbps to compare the bit-error-rate (BER) performance by using the measured and modeled channels. Both coded and uncoded OFDM systems are simulated. It is observed that the BER performance agrees well for the measured and modeled channels. In addition, directive configurations can provide sufficient link margins and BER performance for high data rate communications. To increase the coverage and performance in the NLOS area, it is preferable to apply directive antennas.
Highlights
In recent years, intensive efforts have been made worldwide for the application of high data rate wireless communication system in the frequency band of 60 GHz [1,2,3,4,5]
We have found that for all the antenna configurations the coherence bandwidths at level 0.9 can be empirically related to the RMS delay spread (RDS) by στ · Bc0.9 = 0.063 [14], but the mean values of στ · Bc0.5 are highly variant for different configurations
We analyzed the time dispersion and frequency selectivity of 60 GHz channels with various antenna configurations based on extensive channel measurements in LOS/NLOS environments
Summary
Intensive efforts have been made worldwide for the application of high data rate wireless communication system in the frequency band of 60 GHz [1,2,3,4,5]. The low-cost and low-complexity implementation of such systems requires a suitable channel model for the characteristics of the 60 GHz radio propagation, which can be used for the codesign of RF front-end and baseband processing To this end, this paper will focus on channel modelling, model parameter retrieval, and system performance evaluation over 60 GHz channels. In a global area such as a room environment, the average PDP is exponentially decaying over delay in addition to the direct path [20, 21] In this single cluster model, a constant-level part might appear before the decaying part caused by the elevation dependence of antenna radiation patterns and the height difference between the transmit antenna and the receive antenna [21].
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