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— Joint detection based on exploiting differences among the channels employed by several users allows a receiver to distinguish cochannel signals without reliance on spectrum spreading. This paper makes a number of new contributions to the topic: it provides an analytical expression for the union bound on average symbol-error rate for an arbitrary number of(More)
Studies of the pedunculopontine (PPT) and laterodorsal tegmental (LDT) nuclei in the mesopontine tegmentum have emphasized the organization and projections of the cholinergic neurons. We report here that exhibiting glutamate immunoreactivity are present in both the LDT and PPT. These glutamatergic neurons are interspersed among the cholinergic neurons(More)
— Estimation of the channel impulse responses of multiple cochannel users is a key requirement of all multiuser detection and interference cancellation techniques, though little attention has been paid to subject in the context of TDMA systems. This paper addresses a pilot-based technique for multiuser channel estimation in a TDMA system, and makes several(More)
Ng-nitro-L-arginine (L-NArg), a potent nitric oxide synthase inhibitor, has been implicated as a potential mechanism for attenuating the development of tolerance to opioid drugs and for suppressing opioid withdrawal. Neurons in the locus coeruleus (LC) express opioid receptors and these neurons exhibit both tolerance to chronic administration of opioids and(More)
In vitro studies have not consistently demonstrated naloxone-precipitated opiate-withdrawal hyperactivity of locus coeruleus neurons. The reason for this inconsistency may be because partial or complete withdrawal occurred during preparation of the locus coeruleus slice. The aim of the present study was to assay opiate withdrawal-related hyperactivity in(More)
— In this paper we consider a generalization of the per-antenna-rate-control (PARC) MIMO scheme for the HSDPA option of WCDMA. The scheme, called PARC-N , allows the number of transmitted data substreams N to be less than the number of transmit antennas M and selects the best N antennas for transmission. We investigate PARC-N specifically in frequency(More)