Abstract: A map system is provided whereby a plurality of individual puzzle pieces have a first upper planar surface and a second lower planar surface and are arranged in either a first unassembled configuration or a second assembled configuration to form a complete map, whereby at least one of complementary magnet pairs, complementary electronic sensors, complementary printed indicia, or combinations thereof are positioned on said lower planar surface for assembling into the assembled configuration.

Abstract: A map system is provided whereby a plurality of individual puzzle pieces have a first upper planar surface and a second lower planar surface and are arranged in either a first unassembled configuration or a second assembled configuration to form a complete map, whereby at least one of complementary magnet pairs, complementary electronic sensors, complementary printed indicia, or combinations thereof are positioned on said lower planar surface for assembling into the assembled configuration.

Abstract: A method and apparatus for detection and analysis of interference and noise in a received signal within a bandwidth of a predetermined communication channel. A receiver receives a modulated signal and generates a demodulated digital baseband signal. A digital quadrature demodulator receives the digital baseband data signal and demodulates the digital baseband data signal to generate complex digital signal soft-symbol decisions at its output at the received symbol rate. A processor interface in communication with the digital quadrature demodulator and the controller transfers data between the digital quadrature demodulator and the controller. The controller reconstructs a transmitted signal from the transferred data and subtracts the transmitted signal from the modulated signal to generate a third signal representative of noise and interference underlying the transmitted signal within a predetermined communications channel containing the transmitted signal.

Abstract: A method and apparatus for detection and analysis of interference and noise in a received signal within a bandwidth of a predetermined communication channel. A receiver receives a modulated signal and generates a demodulated digital baseband signal. A digital quadrature demodulator receives the digital baseband data signal and demodulates the digital baseband data signal to generate complex digital signal soft-symbol decisions at its output at the received symbol rate. A processor interface in communication with the digital quadrature demodulator and the controller transfers data between the digital quadrature demodulator and the controller. The controller reconstructs a transmitted signal from the transferred data and subtracts the transmitted signal from the modulated signal to generate a third signal representative of noise and interference underlying the transmitted signal within a predetermined communications channel containing the transmitted signal.