In practice, a GPS receiver must first replicate the PRN code that is transmitted by the SV being acquired by the receiver; then it must shift the phase of the replica code until it correlates with the SV PRN code. When cross-correlating the transmitted PRN code with a replica code, the same correlation properties occur that occurs for the mathematical autocorrelation process for a given PRN co...

YUCE, MEHMET RASIT. A Differential-Based Multiple Bit Rate PSK Receiver: Theory, Architecture, and SOI CMOS Implementation.(Under the direction of Professor Wentai Liu.) The development of telecommunications electronics with low power and low mass will be significant for future deep-space communications. The design of a receiver for deep-space communication requires the receiver to be robust ag...

In this paper we consider the performance of the Parametric Weighted Least Square (lW?LS) algorithm for frequency oflset estimation in Orthogonal Frequency-Division Multiplexing (OFDM). No training sequence or redundant information is needed. The correlation between symbols is achieved due to channel spreading, which is assumed to be a Linear Time Invariant (ZTfl jilter with known impulse respo...

The theory of optimum receiver data wireless detection requires synchronization signal parameters that are accurately aligned with those in the transmitter. Therefore, synchronization should be the most robust and reliable element in the receiver design process, ensuring that data detection can continue over deteriorating channels, such as those with fading and large carrier offsets. Furthermor...

Isochron rays are lines perpendicular to isochrons, which represent surfaces of constant two-way traveltime. The image of a temporal sequence of seismic impulses is a sequence of isochrons in depth. The later the time impulse the deeper the isochron. The term isochron ray arises from an analogy between the isochron “movement” and the wave propagation. While isochrons behave as wavefronts, its p...

Three-dimensional geoelectrical surveys are widely used to map the subsurface in areas with complex geology. Field survey methods using offset pole–dipole and dipole–dipole arrays have been proposed large efficiently. However, it has found that negative apparent resistivity values sometimes encountered contrasts, particularly when offsets between current electrodes potential dipoles used. The v...

The WCDMA system, an asynchronous CDMA scheme, uses different downlink scrambling codes for each base station, not requiring synchronization between the base stations as in the synchronous CDMA systems. However, the mobile station needs to obtain initial code synchronization by resolving both the code and timing uncertainty. The 3GPP group adopts the use of a three-step cell search scheme [1]. ...

Future military waveforms are most probably implemented on software defined radios capable to handle several waveforms. Implementation of several waveforms would require design of several receiver chains. In order to ease these design tasks, this paper describes a universal frequency domain baseband receiver structure. The structure may be used as a starting point to design receiver basebands f...

We present a methodology for OFDM link capacity and bit error rate calculation that jointly captures the aggregate effects of various real life receiver imperfections such as: carrier frequency offset, channel estimation error, outdated channel state information due to time selective channel properties and flat receiver I/Q imbalance. Since such an analytical analysis is still missing in litera...

The all-digital, high data-rate parallel receiver that is currently being developed jointly by the Jet Propulsion Laboratory (JPL) and Goddard Space Flight Center (GSFC) is presented. The role of JPL has been to analyze and simulate the receiver architecture and subsystems. Implementation of the receiver using fieldprogrammable gate arrays (FPGAs) and subsequent application-specific integrated ...