Abstract: The system includes a transmitter for generating a signal and a cyclic prefix, wherein the transmitter suppresses a plurality of sub-symbols of the signal to produce a partial response signal. A portion of the partial response signal is dropped and the resulting truncated signal is used to modulate a carrier signal. The carrier signal is transmitted to the receiver through a noisy channel. The receiver receives a noisy signal and recovers the carrier signal and, hence, the partial response signal from the noisy signal.

Abstract: A mobile telephone including a body, a display, and a keypad. The keypad has a plurality of individual numeral keys assigned to individual numerals that are disposed about a navigation key for navigating about the display or a selected central key.

Abstract: A communication device including control circuitry with transceiver capabilities, input keys coupled to the circuitry for entering information, a display coupled to the circuitry for visual presentation of information, a chassis for securely holding the circuitry and the display, a sound generation unit coupled to the circuitry for providing audio presentation of information, and an interface unit including a speaker unit and an antenna unit, wherein the interface unit is removable. The interface unit can be removed and replace with other interface units including various other functions and features, such as multimedia, gaming, storage, and interface specific activation of devices.

Abstract: Various embodiments of a compact personal communication device are wherein each embodiment provides a full-feature keyboard and/or gaming control. The device provides a user with voice and data communication. The device includes a display, a first unit and a second unit coupled to the display for providing the user with input controls, a first locking mechanism for engaging the first unit in the closed position to securely hold the first unit in a closed position, and a second locking mechanism for engaging the first unit in the open position in order to securely hold the first unit in an open position.

Abstract: A cover and a method for creating the cover are disclosed. The cover includes a frame and a lens secured to the frame. A first and second surface regions of the lens are proximally located relative to the frame, such that the first surface region is polished to allow light that emerges from the frame to pass through and the second surface region is rough in order to reflect light emerging from the frame. The method of creating a fading color hue in a cover includes the steps of creating a polished region on one surface the lens; creating a reflective region on another surface of the lens to allow for maximum reflection of light; creating a dispersion region on a third surface region of the lens, wherein the third surface is positioned opposite the reflective region; and securing the lens to the frame, such that the polished region and the reflective region are in close proximate to the frame thereby creating a gradually fading hue in the lens.

Abstract: A mobile telephone includes a body, a display, and a keypad. The keypad is removably secured to the body and coupled to a processor. The keypad is depressible along a plurality of directions and can be switched between a first mode and second mode, wherein each combination of depressible direction and mode represent a unique group of alphanumeric letters. The processor includes word recognition software, such a desire word can be determined form the sequence of groups of letter selected without having to select each individual letter.

Abstract: A mobile telephone includes a body, a display, and a keypad. The keypad has a plurality of individual numeral keys assigned to individual numerals and may be rotated with respect to the body. In this way it is possible for the presentation of information on the display to remain in a fixed orientation with respect to a user while the body is rotated about the display so that the mobile telephone can be converted from right-handed to left-handed use or the display can be moved from a first orientation to a second orientation.

Abstract: A compact device for communication and entertainment needs that include combining various functions performed by different keypads and units into a single pad or unit. The device includes circuitry with transceiver capabilities, a chassis, a display two arms secured to the chassis that can rotate from an open position to a closed position, and a user-interface that provides the user with navigational control and image conversion.

Abstract: A compact device and method for communication and entertainment needs that include combining various functions performed by different keypads and units into a single pad or unit. The device includes circuitry with transceiver capabilities, a chassis, a display, two arms secured to the chassis that can rotate from an open position to a closed position, and a user-interface that provides the user with navigational control and image conversion. The method for reducing the number pads on a keypad of the device, which has the circuitry, includes providing a chassis for securely holding the circuitry, securing a user-interface to the chassis, coupling the user-interface to the circuitry, limiting rotation of the user-interface to a first range of rotational motion using a locking mechanism to provide navigational control, and releasing the locking mechanism to allow rotation of the user-interface beyond the first range of rotational motion to provide image conversion.

Abstract: A compact device and method for communication and entertainment needs that include having interchangeable user-interfaces and combining various functions performed by different keypads and units into a single pad or unit. The device includes circuitry with transceiver capabilities, a chassis, a display, at least two Freestyle User-Interfaces (FUI) secured to the chassis that can rotate from an open position to a closed position, and a user-interface that provides the user with navigational control and image conversion. The method of interchanging at least two FUIs includes providing a chassis for securely holding the circuitry, rotatably securing the user-interfaces to the chassis, coupling the user-interfaces to the circuitry, and removably securing opposite ends of an elastic piece to each of the user-interfaces.

Abstract: A communication device including control circuitry with transceiver capabilities, input keys coupled to the circuitry for entering information, a display coupled to the circuitry for visual presentation of information, a chassis for securely holding the circuitry and the display, a sound generation unit coupled to the circuitry for providing audio presentation of information, and a retaining unit secured to the chassis for releasable retaining the sound generation unit in the inactive position, wherein the retaining unit is operated by a button, such that pressing the key causes the retaining unit to release the sound generation unit thereby allowing the sound generation unit to move from an inactive position to an active position.

Abstract: A handheld device that has a modifiable handgrip configuration. The modifiable handgrip configuration allows the form of the handheld device to be changed depending on a user's preference. A user may change the handgrip configuration of the device to a form optimized for gripping by a particular manner according to needs. In an embodiment, the handheld device comprises substantially parallel sides configured to allow attachment and removal of alternative handgrips.