Abstract: Embodiment herein provide a Bose-Chadhuri-Hocquenghem (BCH) encoder for generating a BCH signal. The BCH encoder (1) includes a memory for storing a minimum distance to be used for generating the BCH signal for a BCH code (n, k) and a polynomial generator for generating a generator polynomial for the BCH code (n, k) and encoding the generator polynomial to obtain the BCH signal. The polynomial generator includes a set of k registers (4) connected in series to receive the information bits and output an encoded bit based on a clock signal, a first gate (5) to receive a code length, a number of information bits, and the minimum distance as input, a second gate (6), and a finite field adder circuit (7) for determining a finite field sum of the output of each register of the set of k registers (4).

Abstract: Embodiment herein provide a Bose-Chadhuri-Hocquenghem (BCH) encoder for generating a BCH signal. The BCH encoder (1) includes a memory for storing a minimum distance to be used for generating the BCH signal for a BCH code (n, k) and a polynomial generator for generating a generator polynomial for the BCH code (n, k) and encoding the generator polynomial to obtain the BCH signal. The polynomial generator includes a set of k registers (4) connected in series to receive the information bits and output an encoded bit based on a clock signal, a first gate (5) to receive a code length, a number of information bits, and the minimum distance as input, a second gate (6), and a finite field adder circuit (7) for determining a finite field sum of the output of each register of the set of k registers (4).

Abstract: The present application provides a process for preparing a composite anode for a lithium ion cell comprising the steps of: (i) forming an anode slurry in a planetary mixing machine by mixing active materials, a binder and a solvent; (ii) coating the slurry over a copper foil substrate in a coating machine at a speed of 0.3-1.0 m/min; and (iii) calendering of the anode in a calendering machine at a temperature of 50-150° C. The lithium ion cell with the anode disclosed in this invention and a cathode exhibited a capacity retention of >80% at 100% depth-of-discharge at C/2-1C charge-discharge rate when tested for 2000 cycles.

Abstract: A system (100) and method (300) for launching multiple satellites from a launch vehicle is provided. The system includes a mechanical structure (102) which has one or more mounting means (104A-F), a control unit (106) for controlling the one or more mounting means for positioning and separating the multiple satellites in the mechanical structure, an image capturing system for monitoring the positioning of each satellite in the mechanical structure. The mounting means are adapted to position the satellites in axial, inclined and radial separations at a distance to ensure that each satellite will not come in contact with each other in short duration as well as long duration of orbit evolution.

Abstract: The present invention discloses a triple input smart power supply module capable to work with solar power, utility power or battery to empower the desktop PC and any other gadgets where final power source is DC, to stand brown outs and black outs reliably and saving 58 to 65% of power and much more when connected with solar panel. For PC application it comprises of 10-16V DC-DC ATX PC power supplies, 15V DC power supply from 230V AC using PFC techniques, switching rectifier circuits, a solar panel within the range 50-80 Wp, 12V SMF battery, a current limited charger circuit and a monitor working on 12V DC. The invention will be a revolutionary and path breaking venture in the production and use of “Green PCs”. Scope of TRISP is not limited to PCs and it can be extended to any gadget requiring steady and clean input power with a backup facility, where final input power source is DC.

Abstract: A printed quasi-tapered tape helical element and printed helical array antenna. The helical element comprises a thin helix conductor having a uniform section associated with a tapered section. The helix conductor can be printed on a thin dielectric sheet and bonded to a hollow composite dielectric support. A solid copper conductor is configured to provide electrical connection between a feeding point of the helix conductor and a microstrip line of a microstrip feed network. The uniform and tapered helix turns are respectively wrapped around the uniform and tapered sections, which enables impedance matching, axial mode excitation, gain and radiation patterns, and damping out of standing waves generated in current distribution over the helix conductor. Conductive composite cups surrounding each helical element reduces mutual coupling in array environment. Thus, the helical element and the array antenna achieve low on-axis and off-axis axial ratio performance over the wideband for global coverage.

Abstract: A system and method for detecting and isolating faults in pressure ports (2) and pressure transducers (3) of a pressure sensing system are disclosed. The system comprises a set of pressure ports (2) flushed to a nose cap (1) of a space vehicle in crucifix form. Three pressure transducers (3) are connected to each pressure port (2) through pneumatic tubes (4) for measuring surface pressure from the pressure ports (2). Separate power supplying units (7, 8, 9) are connected to the three pressure transducers (3) for powering the pressure transducers (3) at each pressure port (2). A processing unit (10) is configured to acquire voltage inputs corresponding to the measured surface pressure from the pressure transducers (3). The processing unit (10) executes one or more levels of fault checking to detect and isolate pressure transducer failures and blockage of the pressure ports (2) based on the voltage inputs. Hence, it is possible to enhance the accuracy and reliability of the pressure estimation of the FADS.

Abstract: A system and method for detecting and isolating faults in pressure ports (2) and pressure transducers (3) of a pressure sensing system are disclosed. The system comprises a set of pressure ports (2) flushed to a nose cap (1) of a space vehicle in crucifix form. Three pressure transducers (3) are connected to each pressure port (2) through pneumatic tubes (4) for measuring surface pressure from the pressure ports (2). Separate power supplying units (7, 8, 9) are connected to the three pressure transducers (3) for powering the pressure transducers (3) at each pressure port (2). A processing unit (10) is configured to acquire voltage inputs corresponding to the measured surface pressure from the pressure transducers (3). The processing unit (10) executes one or more levels of fault checking to detect and isolate pressure transducer failures and blockage of the pressure ports (2) based on the voltage inputs. Hence, it is possible to enhance the accuracy and reliability of the pressure estimation of the FADS.

Abstract: Methods and system to control the data processing workflows in distributed environment with asynchronous message driven mechanism. A production workflow includes an ordered sequence of tasks to be executed that needs to be distributed on multiple computational nodes. Each task is assigned by a sender application to a receiver application running on a computational node through a message. On receiving the message, the receiver application sends and sends an acknowledgment to the message and schedules the sub tasks associated with the task. The sender application on receiving the acknowledgment removes the message from the queue otherwise the messages are stored in the database. On completion of the sub tasks the receiver application generates a message and the sender application on receipt of the message takes up the next task in the sequence and generates a message to another application. The sender application keeps on generating messages till all the tasks are completed in the sequence.

Abstract: A method and system for communicating signal data in GNSS system using LDPC convolution codes. The method involves, at transmitting end, formatting signal data into a set of subframes. Each subframe of the signal data can be encoded in accordance with a parity check matrix defining Tanner graph representation of LDPC convolution codes. The encoded signal data can be interleaved and added with a Sync word field to transmit an interleaved block of encoded signal data through a communication channel. At receiving end, the interleaved block of encoded signal data can be de-interleaved after it is received from the communication channel. The Tanner Graph shows the connectivity in time invariant parity check matrix. A message passing technique is used to decode the LDPCCC encoded message. The encoded signal data can be decoded through the message passing technique to obtain the signal data primitively transmitted at the transmitting end.

Abstract: An Ortho Mode Transducer (OMT) comprising a main guide configured with a set of ports and at both ends for communicating a band of frequencies. The ports and are placed at a predetermined distance from each other to form a taper section. Branching waveguides are disposed around the main guide for extracting polarization signals from the main guide. Coupling apertures are disposed apart along the periphery of the main guide for coupling the branching waveguides to the main guide. The coupling apertures are aligned parallel to a longitudinal axis of the main guide and extended to the taper portion of the main guide, which enhances bandwidth performance without the need for additional extraneous impedance matching elements.

Abstract: A system and method for detecting and isolating faults in pressure ports (2) and pressure transducers (3) of a pressure sensing system are disclosed. The system comprises a set of pressure ports (2) flushed to a nose cap (1) of a space vehicle in crucifix form. Three pressure transducers (3) are connected to each pressure port (2) through pneumatic tubes (4) for measuring surface pressure from the pressure ports (2). Separate power supplying units (7, 8, 9) are connected to the three pressure transducers (3) for powering the pressure transducers (3) at each pressure port (2). A processing unit (10) is configured to acquire voltage inputs corresponding to the measured surface pressure from the pressure transducers (3). The processing unit (10) executes one or more levels of fault checking to detect and isolate pressure transducer failures and blockage of the pressure ports (2) based on the voltage inputs.

Abstract: A printed quasi-tapered tape helical element and printed helical array antenna arc disclosed. The helical element comprises a thin helix conductor having a uniform section associated with a tapered section. The helix conductor can be printed on a thin dielectric sheet and bonded to a hollow composite dielectric support. A solid copper conductor is configured to provide electrical connection between a feeding point of the helix conductor and a microstrip line of a microstrip feed network. The uniform and tapered helix turns are respectively wrapped around the uniform and tapered sections, which enables impedance matching, axial mode excitation, gain and radiation patterns, and damping out of standing waves generated in current distribution over the helix conductor. Conductive composite cups surrounding each helical element reduces mutual coupling in array environment. Thus, the helical element and the array antenna achieve low on-axis and off-axis axial ratio performance over the wideband for global coverage.

Abstract: A system and method for detecting and isolating faults in pressure ports (2) and pressure transducers (3) of a pressure sensing system are disclosed. The system comprises a set of pressure ports (2) flushed to a nose cap (1) of a space vehicle in crucifix form. Three pressure transducers (3) are connected to each pressure port (2) through pneumatic tubes (4) for measuring surface pressure from the pressure ports (2). Separate power supplying units (7, 8, 9) are connected to the three pressure transducers (3) for powering the pressure transducers (3) at each pressure port (2). A processing unit (10) is configured to acquire voltage inputs corresponding to the measured surface pressure from the pressure transducers (3). The processing unit (10) executes one or more levels of fault checking to detect and isolate pressure transducer failures and blockage of the pressure ports (2) based on the voltage inputs. Hence, it is possible to enhance the accuracy and reliability of the pressure estimation of the FADS.

Abstract: A dielectric resonator filter comprising a metal wall (11) that is configured with metal cavities. Dielectric resonators (12, 14, 15) and (16) can be placed in the metal cavities and configured as a set of cylindrical TE mode resonators (12) and (14) and a set of rectangular HE mode resonators (15) and (16). Separating walls (13) are disposed between the dielectric resonators (12, 14, 15) and (16), which include tunable irises (17) for electromagnetic mixed coupling between the cylindrical TE mode resonators (12) and (14) and the rectangular HE mode resonators (15) and (16). The rectangular HE mode resonators (15) and (16) are configured to push far up the TE mode in frequency. This leads to an easy separation of two degenerate HE modes, a wide spurious free stop band and also achieves electric coupling without using any additional coupling member.

Abstract: A control circuit for diode based RF circuit (6) comprising at least one analog communicating device (2, 3) having a plurality of digital control lines (A0, A1, A2, En1, B0, B1, B2, En2), a plurality of selectable poles (X0-X15) and at one common pole (Y1, Y2), the digital control lines being connected to a digital data generator (4) and the selectable poles and at least one common pole being connected to the control terminal(s) of the diode(s) of the RF circuit through a network of resistors (7-21) of differing values and a potential divider (22) and a power supply or voltage source (25) or a network of potential dividers of differing outputs and a power supply or voltage source, the analog communicating device establishing an internal coupling between the common pole and one of the selectable poles depending upon the digital value generated by the digital data generator and appearing at the digital control.

Abstract: A multiband antenna system for operating at L-band, S-band and UHF-band. The antenna includes L-band antenna elements and S-band antenna elements provided in the form of quadrifilar helices spaced from each other on the surface of a hollow cylindrical insulator. UHF band antenna elements are provided in the form of a cage dipole on the surface of the hollow cylindrical insulator. The L-band antenna input is connected to a first connector through an L-band feed network card. The S-band antenna input is connected to a second connector through an S-band feed network card and the UHF-band antenna input is connected to a third connector through a split sheath balun provided along the axis of the hollow cylindrical insulator.

Abstract: Polyols containing basic nitrogen of the formula wherein n denotes the degree of polymerization of the homopolymer of 12-hydroxy stearic acid, and varies between 2 and 10. The compounds are useful as precursors of urethane polymers.