In this contribution we review recent results obtained on blind source separation (BSS) and independent component analysis (ICA). In particular we show that maximi-sation of mutual information can lead to ICA, and we present new conditions on cross cumulants which guarantee that blind source separation has been performed.

The paper proposes a GUARD (GUide, Alarm, Recovery, and Detection) system for the blind. The main goal of the GUARD system is to construct an obstacle-aware wireless sensor network and provide guide, alarm, recovery, as well as detection functions for the blind to guarantee his safety and convenience at Tamkang University. Some hardware components as well as communication and management protoco...

Multiuser detection in Code Division Multiple Access systems usually requires either knowledge of the transmitted signature sequences and channel state information or use of a known training sequence for adaptation. In this paper we develop a scheme that can be employed for the joint adaptive blind multiuser identification and detection in asynchronous CDMA systems. This scheme relies on a mult...

The goal of zero-knowledge watermark detection is to allow a prover to soundly convince a verifier of the presence of a watermark in certain stego-data without revealing any information which the verifier can use to remove the watermark. Existing proposals do not achieve this goal in terms of definition (not formally zero-knowledge), security (unproven) and coverage (handle only blind watermark...

This paper addresses hardware design issues of a mobile receiver for future generation direct sequence CDMA wireless communication systems. In the design of a mobile unit, xed-point hardware is an attractive alternative because of increased speed, reduced power consumption, and reduced hardware costs. In this paper, we focus on the xed-point implementation of `blind' detection and channel estim...

To achieve a better tracking of time-varying channel parameters, a structure using blind adaptive minimum output energy (MOE) detection in conjunction with a Rake combining diversity for direct-sequence code-division multiple-access (DS/CDMA) communications over the frequency selective multipath fading channels is introduced. In this MOE-RAKE structure, the signal replicas received from multipl...

This chapter reviews space-time processing methods for CDMA mobile radio applications with emphasis on blind signal detection. We begin with a motivation for the use of blind space-time processing in CDMA. Next, we develop channel and signal models useful for blind processing. We follow this by considering rst space-time single user receivers (ST-RAKE) and then review some basic theory of blind...

the radars that use medium prf, have either range ambiguity or doppler ambiguity, but these ambiguities can be resolved with selecting a prf set. avoiding ghost targets detection and minimizing blind zones are two important points that we should consider in targets detection. then, using this set, coincident algorithm and clustering the closely detected points, we resolve ambiguity and detect t...

Blind People uses white canes to aid in obstacle detection & avoidance. Guide dogs can also be of limited aid for finding the way to a remote location. So our goal is to create a portable, simple less costly system that will allow Blind peoples to travel through familiar and unfamiliar environments without the aid of guides. Several guidance system has been developed for vision impaired people,...