Abstract: A carbon monoxide detection assembly includes a detection unit that may be positioned in an enclosed area. The detection unit includes a carbon monoxide sensor to detect carbon monoxide in the enclosed area. A remote unit is in electrical communication with a garage door opener and the detection unit. The remote unit turns the garage door opener on when the carbon monoxide sensor detects carbon monoxide. A valve is fluidly coupled to a fuel source for a gas appliance and the valve is in electrical communication with the detection unit. The valve restricts the fuel from flowing to the gas appliance when the detection unit detects carbon monoxide. A communication unit is in electrical communication with an emergency responder and the detection unit. The communication unit alerts the emergency responder that carbon monoxide has been detected in the enclosed area.

Abstract: The invention relates to a communication by return pathway from a terminal to a transmitter for reducing in particular interference between beams from the transmitter. A telecommunication system comprises a transmitter designed to render simultaneously active a first number of beams, as resources for a plurality of user terminals. Within the sense of the invention, each terminal calculates, while taking account of interference noise, at least one second preferred number of beams to be rendered simultaneously active by the transmitter, and sends to the transmitter, through the return pathway, an indication of this second preferred number, among information about the quality of reception. The transmitter can then adjust the first number of beams to be rendered active, as a function of the returns from the terminals, for a next burst.

Abstract: The invention relates to an information encoding method for the backward channel of a base station (BS) of a mobile radio system. The base station (BS) comprises M resources and periodically emits (t), toward user terminals (UT), pilot signals enabling, via the latter, the measurement of quality of transmission of resources values (I). The storage (A) of at least one quality of reception of resources value ensues and the transformation (B) of each quality of reception of resources value (II) ensues by quantization into a quantized index value representative of the quality of reception value and constitutive of a metrix relative to each resource. The invention is for use in SDMA and/or OFDMA.

Abstract: A method of assigning one or more spreading sequences to users of a Multi Carrier transmission network, each element of the spreading sequence being, at a transmitter of the network, multiplied by a data item to be transmitted and then transmitted on a corresponding sub-carrier. The method includes obtaining spatial information for each user of the Multi-Carrier transmission network, putting the users in order according to their spatial information, and assigning at least a spreading sequence among a group of ordered spreading sequences to each user according to its order.

Abstract: The invention concerns a transmission method for transmitting a plurality of symbols from a base station of a MC-CDMA telecommunication system to a plurality (K) of users, each symbol (dk) to be transmitted to a user being spread with a coding sequence (ck(l), ckext(l) over a plurality (L) of carriers (l) to produce a plurality of corresponding frequency component, said base station being provided with a plurality (M) of antenna elements. According to the invention, each frequency component produced by a symbol of a user (k) is weighted by a plurality (M) of weighting complex coefficients (wk*(l,m),m=1, . . . ,M) to obtain a plurality (LM) of weighted frequency components (zkm(l)), each weighting coefficient being relative to a user (k), a carrier (l) and an antenna element (m) and said plurality of weighting coefficients being determined from estimates of the channel coefficients (hk(l,m)) of the downlink transmission channels between each antenna element and each user for each carrier frequency.

Abstract: The present invention concerns a method of assigning one or more spreading sequences to users of a Multi Carrier transmission network, each element of the said spreading sequence being, at a transmitter of the said network, multiplied by a data item to be transmitted and then transmitted on a corresponding sub-carrier, characterised in that the method comprises the step of obtaining for each users of the Multi-Carrier transmission network spatial information, putting in order the users according to their spatial information and assigning to each user according to its order at least a spreading sequence among a group of ordered spreading sequences.

Abstract: The invention concerns a transmission method for transmitting a plurality of symbols from a base station of a MC-CDMA telecommunication system to a plurality (K) of users, each symbol (dk) to be transmitted to a user being spread with a coding sequence (ck(l), ckext(l) over a plurality (L) of carriers (l) to produce a plurality of corresponding frequency component, said base station being provided with a plurality (M) of antenna elements. According to the invention, each frequency component produced by a symbol of a user (k) is weighted by a plurality (M) of weighting complex coefficients (wk*(l,m),m=1, . . , M) to obtain a plurality (LM) of weighted frequency components (zkm(l)), each weighting coefficient being relative to a user (k), a carrier (l) and an antenna element (m) and said plurality of weighting coefficients being determined from estimates of the channel coefficients (hk(l,m)) of the downlink transmission channels between each antenna element and each user for each carrier frequency.

Abstract: The present invention concerns a method of determining the transmission power of pilot symbols transmitted by replacing useful signals in a transmission frame of a multicarrier transmission system with spreading of the signal in the frequency domain by spreading sequences.