John R. Farserotu

Learn More
This paper presents a novel UWB communications system using double FM: a low-modulation index digital FSK followed by a high-modulation index analog FM to create a constant-envelope UWB signal. FDMA techniques at the subcarrier level are exploited to accommodate multiple users. The system is intended for low (1–10 kbps) and medium (100–1000 kbps) bit rate,(More)
Code-division multiple access has been widely accepted as the major multiple access scheme in third-generation mobile communication systems. Wide-band CDMA and its hybrid associate time-division CDMA are key elements of the IMT2000 framework of standards. Since the beginning of the 1990s there has been enormous research activity in analysis of the soft(More)
L OCATION is a piece of information that empowers almost any type of application. In contrast to the outdoors, where global navigation satellite systems provide geospatial positioning, there are still millions of square meters of indoor space that are unaccounted for by location sensing technology. Moreover, predictions show that people’s activities are(More)
Recent substantial progress in the domain of indoor positioning systems and a growing number of indoor locationbased applications are creating the need for systematic, efficient, and precise experimental methods able to assess the localization and perhaps also navigation performance of a given device. With hundreds of Khepera III robots in academic use(More)
Personal Area Networks (PANs) are expected to play an important role in future mobile communications and information systems. A proliferation of low data rate sensor and control devices is envisioned. These devices must be able to communicate across various networks in order to provide seamless end-to-end service. At the physical and link level, several(More)
the exploitation of Extremely High Frequency (EHF) bands (30-300 GHz) for broadband transmission over satellite links is a hot research topic nowadays. In particular, the Q-V band (30-50 GHz) and W-band (75-110 GHz) seem to offer very promising perspectives. This paper aims at presenting an overview of the current status of research and technology in EHF(More)
We propose a high-resolution ranging algorithm for Impulse Radio (IR) Ultra-WideBand (UWB) communication systems in additive white Gaussian noise. We formulate the ranging problem as a MaximumLikelihood (ML) estimation problem for the channel delays and amplitudes at the receiver. Then we translate the obtained delay estimates into an estimate of the(More)
Ahstr~ict:. Mult ip le parallcl orthogonal transmission links may be found from a MlMO system using the eigenvectors derived from thc SVD o f the channel matrix. These transmission links are called eipnrrrodcs. For (M,, N,) = (8, 4 ) and (M,, N,) = (4, 2) AllMO systems. the SER performance of all the available rigenmodes have been determined for Rayleigh(More)