GNSSSignals.add_neuman_hofman_code — Method
add_neuman_hofman_code(l5_code, neuman_hofman_code)

Generate 10 periods of the PRN L5 code, with initial_xb_code_states, each ⊻ with one bit of the 10bit Neuman-Hofman sequence 0000110101.

GNSSSignals.gen_code — Function
gen_code(num_samples, gnss, prn, sampling_frequency)
gen_code(
    num_samples,
    gnss,
    prn,
    sampling_frequency,
    code_frequency
)
gen_code(
    num_samples,
    gnss,
    prn,
    sampling_frequency,
    code_frequency,
    start_phase
)
gen_code(
    num_samples,
    gnss,
    prn,
    sampling_frequency,
    code_frequency,
    start_phase,
    start_index
)

Generate the code signal for PRN-Number prn of system gnss at chip rate code_frequency, sampled at sampling rate sampling_frequency. Make sure, that sampling_frequency is larger than code_frequency to avoid overflows with the modulo calculation.

GNSSSignals.gen_code! — Function
gen_code!(code, gnss, prn, sampling_frequency)
gen_code!(
    code,
    gnss,
    prn,
    sampling_frequency,
    code_frequency
)
gen_code!(
    code,
    gnss,
    prn,
    sampling_frequency,
    code_frequency,
    start_phase
)
gen_code!(
    code,
    gnss,
    prn,
    sampling_frequency,
    code_frequency,
    start_phase,
    start_index
)

Generate the code signal inplace for PRN-Number prn of system gnss at chip rate code_frequency, sampled at sampling rate sampling_frequency. Make sure, that sampling_frequency is larger than code_frequency to avoid overflows with the modulo calculation.

GNSSSignals.gen_l5_code — Method
gen_l5_code(initial_xb_code_states)

Calculate the gps L5 PRN satellite_code for the initial XB register states initial_xb_code_states.

julia> initial_states_PRN_num_1_I = [0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0]
julia> prn_code_sat_1_I_signal = gen_l5_code(initial_states_PRN_num_1_I)
GNSSSignals.get_center_frequency — Method
get_center_frequency(galileo_e1b)

Get center frequency of GNSS system GalileoE1B.

julia> get_center_frequency(GalileoE1B())
GNSSSignals.get_code — Method
get_code(modulation, system, phase, prn)

Get code of BOC at phase phase of PRN prn.

GNSSSignals.get_code — Method
get_code(modulation, system, phase, prn)

Get code of LOC at phase phase of PRN prn.

GNSSSignals.get_code — Method
get_code(system, phase, prn)

Get code of type <: AbstractGNSS at phase phase of PRN prn.

julia> get_code(GPSL1(), 1200.3, 1)
GNSSSignals.get_code_frequency — Method
get_code_frequency(galileo_e1b)

Get code frequency of GNSS system GalileoE1B.

julia> get_code_frequency(GalileoE1B())
GNSSSignals.get_code_length — Method
get_code_length(galileo_e1b)

Get code length of GNSS system GalileoE1B.

julia> get_code_length(GalileoE1B())
GNSSSignals.get_code_spectrum_BOCcos — Method
get_code_spectrum_BOCcos(fc, fs, f)

Calculate the spectral power of a cosine phased BOC modulated signal with chiprate fc and subcarrier frequency fs at baseband frequency f

GNSSSignals.get_code_spectrum_BOCsin — Method
get_code_spectrum_BOCsin(fc, fs, f)

Calculate the spectral power of a sine phased BOC modulated signal with chiprate fc and subcarrier frequency fs at baseband frequency f

GNSSSignals.get_code_spectrum_BPSK — Method
get_code_spectrum_BPSK(fc, f)

Calculate the spectral power of a BPSK modulated signal with chiprate fc at baseband frequency f

GNSSSignals.get_code_unsafe — Method
get_code_unsafe(modulation, system, phase, prn)

Get code of BOC at phase phase of PRN prn. The phase will not be wrapped by the code length. The phase has to be smaller than the code length incl. secondary code.

GNSSSignals.get_code_unsafe — Method
get_code_unsafe(modulation, system, phase, prn)

Get code of LOC at phase phase of PRN prn. The phase will not be wrapped by the code length. The phase has to be smaller than the code length incl. secondary code.

GNSSSignals.get_code_unsafe — Method
get_code_unsafe(system, phase, prn)

Get code. It is unsafe because it omits the modding. The phase will not be wrapped by the code length. The phase has to be smaller than the code length incl. secondary code.

julia> get_code(GPSL1(), 1200.3, 1)
GNSSSignals.get_codes — Method
get_codes(gnss)

Get codes of GNSS system as a Matrix where each column represents a PRN.

julia> get_code(GPSL1())
GNSSSignals.get_data_frequency — Method
get_data_frequency(galileo_e1b)

Get data frequency of GNSS system GalileoE1B.

julia> get_data_frequency(GalileoE1B())
GNSSSignals.get_secondary_code — Method
get_secondary_code(galileo_e1b)

Get secondary code of GNSS system GalileoE1B.

julia> get_secondary_code(GalileoE1B())
GNSSSignals.read_in_codes — Method
read_in_codes(type, filename, num_prns, code_length)

Reads Int8 encoded codes from a file with filename filename (including the path). The code length must be provided by code_length and the number of PRNs by num_prns.

Examples

julia> read_in_codes("/data/gpsl1codes.bin", 32, 1023)
GNSSSignals.reshape — Method
reshape(integer)

Takes the status of the registers as an integer and returns them as an array.

Examples

julia> reshape(8190)
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0]
GNSSSignals.shift_register — Method
shift_register(register, indices)

Takes the status of the registers as an Int registers, and an array of register indices to calculate and return the new register values and the register output.

julia> reshape(8190)
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0]
julia> output, registers = shift_register(8910,  [9, 10, 12, 13])
julia> reshape(registers)
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
julia> output == 1
true