Abstract: A person activity recognition system (1) comprising: an image sensor (2) arranged to collect at least one image of a personal environment and generate image data (7) from the at least one image; and a processor (3) communicatively connected to the image sensor (2) to receive image data (7), and to a memory (4) and a database (5); the memory (4) including a list of detectable objects that may be present in the personal environment and corresponding results (8) relating to an activity of the person; and the processor (3) configured to execute a plurality of machine-readable instructions stored in a non-transitory computer readable medium in the memory (4), wherein the instructions, when executed by the processor (3), cause the processor (3) to: receive the image data (7); analyse the image data (7) to detect one or more objects in the personal environment; compare the detected object(s) with the list of detectable objects; and output to the database (5) a result (8) relating to an activity of the person.

Abstract: A method of analysing a spectrum on which information is transmitted, comprising: determining each different type of modulation used for transmitting the information across the spectrum, for each determined modulation, identifying its carrier frequency and its bandwidth, defining characteristics of usage of the spectrum in terms of the determined modulations and their corresponding carrier frequencies and bandwidths.

Abstract: A method of allocating space on a spectrum on which information is transmitted, to information to be transmitted, the method comprising: identifying carrier frequencies and bandwidths of information being transmitted on the spectrum, determining an optimal carrier frequency and bandwidth for the information to be transmitted based on the carrier frequencies and bandwidths of information being transmitted on the spectrum; transmitting the information to be transmitted using modulation at the identified optimal carrier frequency and bandwidth.