33 results about "Space shift keying" patented technology

A space key device comprises a substrate, a thin film circuit board located on the substrate, an elastic body located on the thin film circuit board, a key cap located at the top end of the elastic body, and a scissor foot unit and a balance reinforcing unit which are located between the substrate and the key cap. The balance reinforcing unit comprises a balance rod group, a reinforcing rod group and a middle reinforcing rod, the balance rod group is provided with a front balance rod and a rear balance rod which are pivoted between the key cap and the substrate, and the reinforcing rod group is provided with a front reinforcing rod and a rear reinforcing rod which are pivoted between the key cap and the substrate; the front reinforcing rod is located on the rear side of the front balance rod, the rear reinforcing rod is located on the front side of the rear balance rod, and the middle reinforcing rod is installed on the key cap and located between the front reinforcing rod and the rear reinforcing rod. Therefore, the structural strength of the keycap can be improved, and the thickness of the keycap can be reduced to be less than or equal to 0.5 mm, so that the overall height of the notebook computer keyboard is less than 3.6 mm.

The invention belongs to the technical field of wireless communication, and discloses an orthogonal space shift keying cooperative communication method in a multi-relay network, which comprises the following steps: (S1) an information source node prepares a sending bit sequence and divides the sending bit sequence into two sub-bit sequences; (S2) the information source node carries out check coding and in-phase and quadrature modulation on the two sub-bit sequences respectively, and then combines and sends the two sub-bit sequences; (S3) each relay node performs in-phase and orthogonal detection and verification on the received signal, and then performs self-service activation and marks an activation component; (S4) the activated relay node and the non-activated relay node jointly form a joint relay vector, and the joint relay vector is sent to the information sink node; and (S5) the information sink node detects signals from the information source node and the joint relay vector to obtain a bit sequence detection value of the information source node. Compared with the prior art, the method has the advantages that the number of relays can be halved under the same transmission rate, or the transmission rate can be multiplied under the same number of relays.